987
Moreover , the addition of dexamethasone to the last two doses of mesna was more efficient than three doses of mesna alone when evaluated microscopically .
 Chemical: dexamethasone; Chemical: mesna; Chemical: mesna
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: dexamethasone, mesna, mesna 
Answer:
 Chemical: dexamethasone; Chemical: mesna; Chemical: mesna