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Nephrotoxicity of combined cephalothin - gentamicin regimen .
 Disease: Nephrotoxicity; Chemical: cephalothin; Chemical: gentamicin
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: Nephrotoxicity, cephalothin, gentamicin 
Answer:
 Disease: Nephrotoxicity; Chemical: cephalothin; Chemical: gentamicin