15142
Batch - experiments using a competition method show the exchange of one proton indicating the formation of the AtO ( OH ) species .
 Chemical: AtO ( OH )
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: AtO ( OH ) 
Answer:
 Chemical: AtO ( OH )