13281
In the second case , five cardiac arrests due to ventricular tachycardia and fibrillation occurred during several hours after beginning a trial of bretylium maintenance therapy for complex ventricular ectopy .
 adverse effect: cardiac arrests, bretylium; adverse effect: fibrillation, bretylium; adverse effect: ventricular tachycardia, bretylium
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
 Entity Pairs:  cardiac arrests, bretylium; fibrillation, bretylium; ventricular tachycardia, bretylium 
Answer:
 adverse effect: cardiac arrests, bretylium; adverse effect: fibrillation, bretylium; adverse effect: ventricular tachycardia, bretylium