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Multiple syncopal episodes started to occur during thalidomide treatment , and a Holter electrocardiogram showed multiple abnormalities , with an episode of sustained ventricular tachycardia .
 adverse effect: Multiple syncopal episodes, thalidomide; adverse effect: sustained ventricular tachycardia, thalidomide
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:  Multiple syncopal episodes, thalidomide; sustained ventricular tachycardia, thalidomide 
Answer:
 adverse effect: Multiple syncopal episodes, thalidomide; adverse effect: sustained ventricular tachycardia, thalidomide