21679
Furthermore , iNOS - mediated NO synthesis in the dlPAG is predominantly involved in the behavioral expression of anxiety - like behavior during ethanol withdrawal .
 Chemical: NO; Chemical: ethanol
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: NO, ethanol 
Answer:
 Chemical: NO; Chemical: ethanol