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The recent development of novel irreversible EGFR TKIs , such as afatinib and dacomitinib , is also reviewed .
 Chemical: afatinib; Chemical: dacomitinib
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: afatinib, dacomitinib 
Answer:
 Chemical: afatinib; Chemical: dacomitinib