2623
Chlorambucil central nervous toxicity : a significant side effect of chlorambucil therapy in childhood nephrotic syndrome .
 adverse effect: central nervous toxicity, Chlorambucil
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:  central nervous toxicity, Chlorambucil 
Answer:
 adverse effect: central nervous toxicity, Chlorambucil