25397
Methylene chloride / ethyl acetate / formic acid ( 6 : 10 : 1 , v / v ) as the mobile phase and 1 % vanillin hydrochloric solution as staining reagent were used .
 Chemical: Methylene chloride; Chemical: ethyl acetate; Chemical: formic acid; Chemical: vanillin hydrochloric
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: Methylene chloride, ethyl acetate, formic acid, vanillin hydrochloric 
Answer:
 Chemical: Methylene chloride; Chemical: ethyl acetate; Chemical: formic acid; Chemical: vanillin hydrochloric