17117
The method comprised of extraction with acetonitrile , clean - up by low temperature and water precipitation , and analysis by ultra performance liquid chromatography coupled with electrospray ionization tandem mass spectrometry ( UPLC - ESI - MS - MS ) using multiple reaction monitoring ( MRM ) mode .
 Chemical: acetonitrile
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: acetonitrile 
Answer:
 Chemical: acetonitrile