26084
RATIONALE : Rats develop preferences for places associated with the immediate rewarding effects of cocaine and aversions for places paired with the drug ' s delayed negative effects .
 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: cocaine 
Answer:
 Chemical: cocaine