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Thus , acetaminophen has been used both as a single agent and in combination with other analgesics , whereas phenacetin was available only in combinations .
 Chemical: acetaminophen; Chemical: phenacetin
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: acetaminophen, phenacetin 
Answer:
 Chemical: acetaminophen; Chemical: phenacetin