27720
In the cortex , choline acetyltransferase activity was decreased and 5HT2 receptor binding was increased both in males and females .
 Chemical: choline
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: choline 
Answer:
 Chemical: choline