4297
Thus , interactions between 5 - HT1B receptors and these neurotransmitter systems are suggested to modulate alcohol - drinking behavior .
 Chemical: alcohol
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: alcohol 
Answer:
 Chemical: alcohol