19837
After the observation that episodes of food restriction increase the sensitivity to its hyperphagic effects , the function of NOP receptor and N / OFQ was investigated after cycles of food restrictions .
 None
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:  
Answer:
 None