3607
Effects of training on the extent of experimental myocardial infarction in aging rats .
 Disease: myocardial infarction
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: myocardial infarction 
Answer:
 Disease: myocardial infarction