4184
Effect of nifedipine on renal function in liver transplant recipients receiving tacrolimus .
 Chemical: nifedipine; Chemical: tacrolimus
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: nifedipine, tacrolimus 
Answer:
 Chemical: nifedipine; Chemical: tacrolimus