8687
One case of priapism occurred during heparin therapy for a previous surgical operation to the knee is reported .
 adverse effect: priapism, heparin
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:  priapism, heparin 
Answer:
 adverse effect: priapism, heparin