diff --git a/src/MEDS_DEV/demo/meds_cehrbert.py b/src/MEDS_DEV/demo/meds_cehrbert.py
new file mode 100644
index 0000000..de1c37f
--- /dev/null
+++ b/src/MEDS_DEV/demo/meds_cehrbert.py
@@ -0,0 +1,397 @@
+# ---
+# jupyter:
+#   jupytext:
+#     text_representation:
+#       extension: .py
+#       format_name: percent
+#       format_version: '1.3'
+#       jupytext_version: 1.16.4
+#   kernelspec:
+#     display_name: Python 3
+#     name: python3
+# ---
+
+# %% [Colab-only] Switch Colab to python 3.12
+# !sudo apt-get install python3.12 python3.12-venv
+# import sys
+# !python3.12 -m venv meds_env
+# import os
+# os.environ['PATH'] = '/content/meds_env/bin:' + os.environ['PATH']
+# !pip install --upgrade pip
+
+# # Then in a new code cell:
+# import sys
+# sys.executable = '/content/meds_env/bin/python'
+
+# # Confirm python version is 3.12
+# !python --version
+
+# %% [markdown]
+# ## Install dependencies
+
+# %%
+!pip -q install meds_etl==0.3.6 meds_transforms==0.0.7
+
+# %% [markdown]
+# # Download MIMIC-IV demo
+
+# %%
+# macOS users should install wget (e.g. through brew)
+!wget -q -r -N -c --no-host-directories --cut-dirs=1 -np -P ./content/download https://physionet.org/files/mimic-iv-demo/2.2/
+
+# %%
+# Download pre-meds script, event config (defining how raw data is converted to meds data), and meds-transform config
+!mkdir -p ./content/meds-transform/
+!git clone --depth 1 https://github.com/mmcdermott/MEDS_transforms.git ./content/tmp/
+!mv ./content/tmp/MIMIC-IV_Example ./content/MIMIC-IV_Example
+
+# %%
+# Download MIMIC IV metadata
+MIMICIV_RAW_DIR = "https://raw.githubusercontent.com/MIT-LCP/mimic-code/v2.4.0/mimic-iv/concepts/concept_map"
+MIMICIV_PRE_MEDS_DIR = "./content/pre_meds/"
+!mkdir {MIMICIV_PRE_MEDS_DIR}
+
+OUTPUT_DIR = "./content/download/mimic-iv-demo/2.2"
+
+files = [
+    'd_labitems_to_loinc.csv',
+    'inputevents_to_rxnorm.csv',
+    'lab_itemid_to_loinc.csv',
+    'meas_chartevents_main.csv',
+    'meas_chartevents_value.csv',
+    'numerics-summary.csv',
+    'outputevents_to_loinc.csv',
+    'proc_datetimeevents.csv',
+    'proc_itemid.csv',
+    'waveforms-summary.csv'
+]
+
+for file in files:
+    !wget -O {OUTPUT_DIR}/{file} {MIMICIV_RAW_DIR}/{file}
+    !wget -O {MIMICIV_PRE_MEDS_DIR}/{file} {MIMICIV_RAW_DIR}/{file}
+
+# %%
+# Convert to MEDS
+CURRENT_DIR = !pwd
+CURRENT_DIR = CURRENT_DIR[0]
+
+# %%
+# Convert to MEDS
+TUTORIAL_DIR = CURRENT_DIR + "/content/MIMIC-IV_Example"
+MIMICIV_RAW_DIR = CURRENT_DIR + "/content/download/mimic-iv-demo/2.2"
+MIMICIV_PRE_MEDS_DIR = CURRENT_DIR + "/content/pre_meds"
+MIMICIV_MEDS_DIR = CURRENT_DIR + "/content/meds"
+
+EVENT_CONVERSION_CONFIG_FP = CURRENT_DIR + "/content/MIMIC-IV_Example/configs/event_config.yaml"
+PIPELINE_CONFIG_PATH = CURRENT_DIR + "/content/MIMIC-IV_Example/configs/pipeline_config.yaml"
+!cd {TUTORIAL_DIR} && ./run.sh {MIMICIV_RAW_DIR} {MIMICIV_PRE_MEDS_DIR} {MIMICIV_MEDS_DIR} do_unzip=true
+
+# %% [markdown]
+# # Examine MEDS data
+
+# %%
+import polars as pl
+
+data = pl.read_parquet('./content/meds/data/**/*.parquet')
+data[['subject_id', 'time', 'code', 'numeric_value']]
+
+# %% [markdown]
+# # A simple Polars analysis
+
+# %%
+icd10_events = data.filter(pl.col('code').str.starts_with('DIAGNOSIS//ICD//10//'))
+icd10_events.group_by('code').count().sort('count', descending=True)
+
+# %%
+df = pl.read_parquet("./content/meds/metadata/codes.parquet")
+df
+
+# %% [markdown]
+# ## Using an example MEDS tool, ACES for labeling
+
+# %% [markdown]
+# ## Install ACES
+
+# %%
+!pip install es-aces
+
+# %%
+
+# From ACES documentation
+task_config = """
+description: >-
+  This file specifies the base configuration for the prediction of a hospital los being greater than 3days,
+  leveraging only the first 48 hours of data after admission, with a 24 hour gap between the input window
+  and the target window. Patients who die or are discharged in the gap window are excluded. Note that this
+  task is in-**hospital** los, not in-**ICU** los which is a different task.
+
+predicates:
+  hospital_admission:
+    code: {regex: "HOSPITAL_ADMISSION//.*"}
+  hospital_discharge:
+    code: {regex: "HOSPITAL_DISCHARGE//.*"}
+  death:
+    code: MEDS_DEATH
+  discharge_or_death:
+    expr: or(hospital_discharge, death)
+
+trigger: hospital_admission
+
+windows:
+  input:
+    start: NULL
+    end: trigger + 48h
+    start_inclusive: True
+    end_inclusive: True
+    index_timestamp: end
+  gap:
+    start: input.end
+    end: start + 24h
+    start_inclusive: False
+    end_inclusive: True
+    has:
+      hospital_admission: (None, 0)
+      discharge_or_death: (None, 0)
+  target:
+    start: trigger
+    end: start + 3d
+    start_inclusive: False
+    end_inclusive: True
+    label: discharge_or_death
+"""
+
+!mkdir ./content/tasks/ -p
+TASK_NAME = "in_hospital_3d_los_after_48h"
+TASK_CONFIG_FP = f"./content/tasks/{TASK_NAME}.yaml"
+with open(TASK_CONFIG_FP, 'w') as f:
+    f.write(task_config)
+
+
+# %%
+!pip install es-aces
+
+# %%
+!echo $TASK_NAME
+!echo $TASK_CONFIG_FP
+
+# %%
+!aces-cli --multirun data=sharded data.standard=meds data.root="$MIMICIV_MEDS_DIR/data" "data.shard=$(expand_shards  ./content/meds/data/)" cohort_dir=" ./content/tasks" cohort_name="$TASK_NAME" config_path="$TASK_CONFIG_FP"
+
+# %%
+# TODO: reimporting polars due to dependencies?
+import polars as pl
+
+# Execute query and get results
+df = pl.read_parquet(f"./content/tasks/{TASK_NAME}/**/*.parquet")
+
+print("train prevalence: " + str(round(pl.read_parquet(f"./content/tasks/{TASK_NAME}/train/*.parquet")['boolean_value'].mean(), 3)))
+print("tuning prevalence: " + str(round(pl.read_parquet(f"./content/tasks/{TASK_NAME}/tuning/*.parquet")['boolean_value'].mean(), 3)))
+print("held_out prevalence: " + str(round(pl.read_parquet(f"./content/tasks/{TASK_NAME}/held_out/*.parquet")['boolean_value'].mean(), 3)))
+
+
+df.sort('boolean_value')
+
+# %% [markdown]
+# ## Switch Colab to python 3.11 for cehrbert
+# %%
+# %%capture
+# !sudo apt-get install python3.11 python3.11-venv
+# import sys
+# !python3.11 -m venv cehrbert
+# import os
+# os.environ['PATH'] = './content/cehrbert/bin:' + os.environ['PATH']
+# !pip install --upgrade pip
+
+# %%
+# import sys
+# sys.executable = './content/cehrbert/bin/python'
+
+# %% [markdown]
+# ## Install cehrbert and its dependencies
+
+# %%
+!pip install meds_reader==0.1.9
+!pip install setuptools
+!pip install cehrbert==1.3.1
+
+# %%
+MIMICIV_MEDS_DIR = "./content/meds/"
+MIMICIV_MEDS_READER_DIR = "./content/meds_reader/"
+TASK_DIR="./content/tasks/"
+TASK_NAME="in_hospital_3d_los_after_48h"
+OUTPUT_PRETRAIN_MODEL_DIR="./content/output/cehrbert/"
+# TODO this variable has an identical name?
+OUTPUT_PRETRAIN_MODEL_DIR="./content/output/cehrbert_finetuned/"
+
+# %% [markdown]
+# Run meds_reader on the MEDS data
+
+# %%
+!meds_reader_convert $MIMICIV_MEDS_DIR $MIMICIV_MEDS_READER_DIR
+
+# %%
+!mkdir -p ./content/output/cehrbert/
+!mkdir -p ./content/output/cehrbert_dataset_prepared/
+!mkdir -p ./content/output/cehrbert_finetuned/
+
+# %%
+# !mkdir ./content/github_repo;cd ./content/github_repo;git clone https://github.com/cumc-dbmi/cehrbert.git;cd cehrbert;git checkout fix/meds_evaluation;pip install .;
+
+# %% [markdown]
+# Create the cehrbert pretraining configuration yaml file
+
+# %%
+cehrbert_pretrain_config = """
+#Model arguments
+model_name_or_path: "./content/output/cehrbert/"
+tokenizer_name_or_path: "./content/output/cehrbert/"
+num_hidden_layers: 6
+max_position_embeddings: 1024
+hidden_size: 768
+vocab_size: 100000
+min_frequency: 50
+include_value_prediction: false # additional CEHR-BERT learning objective
+
+#Data arguments
+data_folder: "./content/meds_reader/"
+dataset_prepared_path: "./content/output/cehrbert_dataset_prepared/"
+
+# Below is a list of Med-to-CehrBert related arguments
+preprocessing_num_workers: 2
+preprocessing_batch_size: 128
+# if is_data_in_med is false, it assumes the data is in the cehrbert format
+is_data_in_meds: true
+att_function_type: "cehr_bert"
+inpatient_att_function_type: "mix"
+include_auxiliary_token: true
+include_demographic_prompt: false
+# if the data is in the meds format, the validation split will be omitted
+# as the meds already provide train/tuning/held_out splits
+validation_split_percentage: 0.05
+
+# Huggingface Arguments
+dataloader_num_workers: 2
+dataloader_prefetch_factor: 2
+
+overwrite_output_dir: false
+resume_from_checkpoint: # automatically infer the latest checkpoint from the output folder
+seed: 42
+
+output_dir: "./content/output/cehrbert/"
+evaluation_strategy: "epoch"
+save_strategy: "epoch"
+eval_accumulation_steps: 10
+
+learning_rate: 0.00005
+per_device_train_batch_size: 8
+per_device_eval_batch_size: 8
+gradient_accumulation_steps: 2
+
+num_train_epochs: 50 # for large datasets, 5-10 epochs should suffice
+warmup_steps: 10
+weight_decay: 0.01
+logging_dir: "./logs"
+logging_steps: 10
+
+save_total_limit:
+load_best_model_at_end: true
+metric_for_best_model: "eval_loss"
+greater_is_better: false
+
+report_to: "none"
+"""
+PRETRAIN_CONFIG_FP = f"./content/output/cehrbert/cehrbert_pretrain_config.yaml"
+with open(PRETRAIN_CONFIG_FP, 'w') as f:
+    f.write(cehrbert_pretrain_config)
+
+# %% [markdown]
+# ## Pretrain cehrbert using MLM
+!python3.11 -m cehrbert.runners.hf_cehrbert_pretrain_runner ./content/output/cehrbert/cehrbert_pretrain_config.yaml
+
+# %% [markdown]
+# ## Create the cehrbert finetuning configuration yaml file
+cehrbert_finetune_config = f"""
+#Model arguments
+model_name_or_path: "./content/output/cehrbert/"
+tokenizer_name_or_path: "./content/output/cehrbert/"
+num_hidden_layers: 6
+max_position_embeddings: 1024
+hidden_size: 768
+vocab_size: 100000
+min_frequency: 50
+include_value_prediction: false # additional CEHR-BERT learning objective
+
+#Data arguments
+cohort_folder: "./content/tasks/{TASK_NAME}/"
+data_folder: "./content/meds_reader/"
+dataset_prepared_path: "./content/output/cehrbert_dataset_prepared/"
+
+#LORA
+use_lora: True
+lora_rank: 64
+lora_alpha: 16
+target_modules: [ "query", "value" ]
+lora_dropout: 0.1
+
+# Below is a list of Med-to-CehrBert related arguments
+preprocessing_num_workers: 2
+preprocessing_batch_size: 128
+# if is_data_in_med is false, it assumes the data is in the cehrbert format
+is_data_in_meds: true
+att_function_type: "cehr_bert"
+inpatient_att_function_type: "mix"
+include_auxiliary_token: true
+include_demographic_prompt: false
+# if the data is in the meds format, the validation split will be omitted
+# as the meds already provide train/tuning/held_out splits
+validation_split_percentage: 0.05
+
+# Huggingface Arguments
+dataloader_num_workers: 2
+dataloader_prefetch_factor: 2
+
+overwrite_output_dir: false
+resume_from_checkpoint: # automatically infer the latest checkpoint from the output folder
+seed: 42
+
+output_dir: "./content/output/cehrbert_finetuned"
+evaluation_strategy: "epoch"
+save_strategy: "epoch"
+eval_accumulation_steps: 10
+
+do_train: True
+do_predict: True
+
+learning_rate: 0.00005
+per_device_train_batch_size: 8
+per_device_eval_batch_size: 8
+gradient_accumulation_steps: 2
+
+num_train_epochs: 10
+warmup_steps: 10
+weight_decay: 0.01
+logging_dir: "./logs"
+logging_steps: 10
+
+save_total_limit:
+load_best_model_at_end: true
+metric_for_best_model: "eval_loss"
+greater_is_better: false
+
+report_to: "none"
+"""
+FINETUNE_CONFIG_FP = f"./content/output/cehrbert/cehrbert_finetune_config.yaml"
+with open(FINETUNE_CONFIG_FP, 'w') as f:
+    f.write(cehrbert_finetune_config)
+
+# %%
+# ## Finetune cehrbert for the downstream task
+!python3.11 -m cehrbert.runners.hf_cehrbert_finetune_runner ./content/output/cehrbert/cehrbert_finetune_config.yaml
+
+# %%
+import pandas as pd
+
+pd.read_parquet("./content/output/cehrbert_finetuned/test_predictions")
+
+# %%
+!cat ./content/output/cehrbert_finetuned/test_results.json
diff --git a/src/MEDS_DEV/demo/meds_tab.py b/src/MEDS_DEV/demo/meds_tab.py
index fd7c7e8..4fae3ae 100644
--- a/src/MEDS_DEV/demo/meds_tab.py
+++ b/src/MEDS_DEV/demo/meds_tab.py
@@ -33,7 +33,7 @@
 # ## Install dependencies
 
 # %%
-!pip -q install meds_etl==0.3.6 meds_transforms==0.0.9
+!pip -q install meds_etl==0.3.6 meds_transforms==0.0.7
 
 # TODO install meds-evaluation
 
@@ -100,7 +100,7 @@
 data[['subject_id', 'time', 'code', 'numeric_value']]
 
 # %% [markdown]
-# # A Simple Polars Analysis
+# # A simple Polars analysis
 
 # %%
 icd10_events = data.filter(pl.col('code').str.starts_with('DIAGNOSIS//ICD//10//'))
@@ -114,10 +114,10 @@
 # ## Using an example MEDS tool, ACES for labeling
 
 # %% [markdown]
-# ### Install ACES
+# ## Install ACES
 
 # %%
-!pip install es-aces==0.5.0
+!pip install es-aces
 
 # %%
 
@@ -170,10 +170,15 @@
 with open(TASK_CONFIG_FP, 'w') as f:
     f.write(task_config)
 
+# %%
+!pip install es-aces
+
 # %%
 !aces-cli --multirun data=sharded data.standard=meds data.root="$MIMICIV_MEDS_DIR/data" "data.shard=$(expand_shards  ./content/meds/data/)" cohort_dir=" ./content/tasks" cohort_name="$TASK_NAME" config_path="$TASK_CONFIG_FP"
 
 # %%
+# TODO: reimporting polars due to dependencies?
+import polars as pl
 
 # Execute query and get results
 df = pl.read_parquet(f"./content/tasks/{TASK_NAME}/**/*.parquet")