1272
When discharged less than 24 hours later , he was receiving metoprolol and aspirin , with follow - up plans for echocardiography and nuclear imaging to assess perfusion .
 Chemical: metoprolol; Chemical: aspirin
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: metoprolol, aspirin 
Answer:
 Chemical: metoprolol; Chemical: aspirin