2529
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 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: type I second - degree AV block, ritodrine; adverse effect: type I second - degree AV block, ritodrine