⚠️ For train set, there is a error expression in 'train/caption.txt'.

''' train_58301.jpg \textcircled { 2 } C H _ { 2 } = C H C H _ { 3 } + C l _ { 2 } \xrightarrow [ 5 0 0 ] ^ { \circ } C H _ { 3 } C H C H _ { 2 } C l + H C l '''

Before training, you should fix it.