14920
Ten to 15 % of patients treated with ifosfamide develop an encephalopathy .
 adverse effect: encephalopathy, ifosfamide
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:  encephalopathy, ifosfamide 
Answer:
 adverse effect: encephalopathy, ifosfamide