25708
Participants were less alert during the combined treatment of cetirizine and verapamil as indicated by longer reaction times and decreased blood oxygen level - dependent response in the right superior temporal gyrus .
 Chemical: cetirizine; Chemical: verapamil; Chemical: oxygen
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: cetirizine, verapamil, oxygen 
Answer:
 Chemical: cetirizine; Chemical: verapamil; Chemical: oxygen