28297
CONCLUSIONS : Based on these findings , cocaine self - administration does appear to disrupt behavioral indices of sleep , although it remains to be determined if treatments that improve sleep measures can affect future cocaine taking .
 Chemical: cocaine; Chemical: cocaine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: cocaine; Chemical: cocaine