9971
After the first oral dose of propranolol , syncope developed together with atrioventricular block .
 atrioventricular block, propranolol; syncope, propranolol
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 atrioventricular block, propranolol; syncope, propranolol