26602
Each morning , rhesus monkeys pressed a lever to receive food pellets under a fixed - ratio 50 schedule of reinforcement ; cocaine was self - administered under a progressiveratio schedule of reinforcement in the evening .
 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