8421
BACKGROUND : Ovarian cancer arising from an endometriotic cyst in a postmenopausal woman under tamoxifen therapy is rare .
 adverse effect: Ovarian cancer, tamoxifen
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:  Ovarian cancer, tamoxifen 
Answer:
 adverse effect: Ovarian cancer, tamoxifen