diff --git a/bookmark.md b/bookmark.md
index 5cc2b9f..7572a5f 100644
--- a/bookmark.md
+++ b/bookmark.md
@@ -28,10 +28,12 @@ In the latter case, the topic would be a `bookmark#Topic`, see [Jeff Zucker's do
     a bk:topic ;
     bk:subTopicOf <https://ME.example.org/animals.ttl#Animals> .
 ```
+
 ### Created (optional)
 * `<bookmark> <http://purl.org/dc/terms/created> "2023-11-21T14:16:16Z"^^<http://www.w3.org/2001/XMLSchema#dateTime> .`
 * Soukai stores created_at and updated_at on a separate metadata object, as follows:
-```
+
+```turtle
 @prefix : <#>.
 @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
 @prefix xsd: <http://www.w3.org/2001/XMLSchema#>.