1799
The purpose of this study was to examine the incidence and cause of Clostridium difficile colitis occurring after cisplatin - based combination chemotherapy in ovarian cancer patients .
 adverse effect: Clostridium difficile colitis, cisplatin
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: Clostridium difficile colitis, cisplatin