19630
The gas - phase reaction of methane sulfonic acid with the hydroxyl radical without and with water vapor .
 Chemical: methane sulfonic acid; Chemical: hydroxyl
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: methane sulfonic acid, hydroxyl 
Answer:
 Chemical: methane sulfonic acid; Chemical: hydroxyl