7662
The electrocardiogram ( ECG ) , which was read as normal prior to ritodrine infusion , demonstrated a type I second - degree AV block which disappeared upon discontinuation of ritodrine therapy .
 adverse effect: type I second - degree AV block, ritodrine; adverse effect: type I second - degree AV block, ritodrine
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:  type I second - degree AV block, ritodrine; type I second - degree AV block, ritodrine 
Answer:
 adverse effect: type I second - degree AV block, ritodrine; adverse effect: type I second - degree AV block, ritodrine