17224
The separation was performed on a Waters Xbridge ( TM ) C18 column with a linear gradient of acetonitrile - water containing 5mM ammonium acetate .
 Chemical: acetonitrile; Chemical: ammonium acetate
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, ammonium acetate 
Answer:
 Chemical: acetonitrile; Chemical: ammonium acetate