29340
Thus , the increase in mPFC DAT function was an SHR - specific long term consequence of methylphenidate treatment during adolescence , which may be responsible for the treatment - induced alterations in behavior including the observed increases in cocaine self - administration .
 Chemical: methylphenidate; Chemical: cocaine
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: methylphenidate, cocaine 
Answer:
 Chemical: methylphenidate; Chemical: cocaine