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INTRODUCTION : Although gefitinib used for the treatment of non - small - cell lung cancer is a well - known cause of interstitial lung disease ( ILD ) , few case reports on erlotinib - induced ILD have been issued .
 adverse effect: ILD, gefitinib; adverse effect: ILD, erlotinib; adverse effect: interstitial lung disease, gefitinib
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:  ILD, gefitinib; ILD, erlotinib; interstitial lung disease, gefitinib 
Answer:
 adverse effect: ILD, gefitinib; adverse effect: ILD, erlotinib; adverse effect: interstitial lung disease, gefitinib