19637
Our kinetic calculations show that 99 . 5 % of the reaction involves this interchange of the water molecule and , consequently , water vapor does not play any role in the oxidation reaction of methane sulfonic acid by the hydroxyl radical .
 Chemical: methane sulfonic acid; Chemical: hydroxyl
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: methane sulfonic acid; Chemical: hydroxyl