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He was started on digoxin , 0.25 mg daily , because of echocardiographically demonstrated left ventricular dilatation and functional impairment ; he died of ventricular fibrillation 15 days later .
 adverse effect: functional impairment, digoxin; adverse effect: left ventricular dilatation, digoxin; adverse effect: ventricular fibrillation, digoxin
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 adverse effect: functional impairment, digoxin; adverse effect: left ventricular dilatation, digoxin; adverse effect: ventricular fibrillation, digoxin