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A mobile phase consisted of 0 . 02 % formic acid in water ( v / v ) and 0 . 02 % formic acid in acetonitrile ( v / v ) was used with a flow rate of 0 . 5 mL min ( - 1 ) .
 Chemical: formic acid; Chemical: formic acid; 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: formic acid, formic acid, acetonitrile 
Answer:
 Chemical: formic acid; Chemical: formic acid; Chemical: acetonitrile