2254
Treatment was empirically initiated with vancomycin , levofloxacin , and piperacillin / tazobactam .
 Chemical: vancomycin; Chemical: levofloxacin; Chemical: piperacillin; Chemical: tazobactam
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: vancomycin; Chemical: levofloxacin; Chemical: piperacillin; Chemical: tazobactam