11636
After approximately two weeks of sertraline treatment he noted an intense itching sensation in his scalp after eating a piece of chocolate cake .
 adverse effect: intense itching sensation, sertraline
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:  intense itching sensation, sertraline 
Answer:
 adverse effect: intense itching sensation, sertraline