2973
In utero exposure to valproic acid ( VPA ) , a histone deacetylase ( HDAC ) inhibitor , causes neural tube , heart , and limb defects .
 Chemical: valproic acid; Chemical: VPA
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: valproic acid, VPA 
Answer:
 Chemical: valproic acid; Chemical: VPA