7223
The behavior of sarin is similar to that of its common simulant , dimethyl methylphosphonate .
 Chemical: sarin; Chemical: dimethyl methylphosphonate
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: sarin, dimethyl methylphosphonate 
Answer:
 Chemical: sarin; Chemical: dimethyl methylphosphonate