19800
Acoustics as a Tool for Better Characterization of Ionic Liquids : A Comparative Study of 1 - Alkyl - 3 - methylimidazolium Bis [ ( trifluoromethyl ) sulfonyl ] imide Room - Temperature Ionic Liquids .
 Chemical: 1 - Alkyl - 3 - methylimidazolium Bis [ ( trifluoromethyl ) sulfonyl ] imide
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: 1 - Alkyl - 3 - methylimidazolium Bis [ ( trifluoromethyl ) sulfonyl ] imide