5212
24h later , the measurement of airway reactivity to methacholine in vivo by a forced oscillation technique showed a significant and dose - dependent increase in airway resistance in non - diabetic mice exposed to DEP versus non - diabetic mice exposed to saline .
 Chemical: methacholine
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: methacholine 
Answer:
 Chemical: methacholine