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An obese patient , not diabetic , treated with metformin for some weeks , was referred to us with severe inferior digestive hemorrhage , diagnosed with Meckel 's diverticulum .
 adverse effect: severe inferior digestive hemorrhage, metformin
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:  severe inferior digestive hemorrhage, metformin 
Answer:
 adverse effect: severe inferior digestive hemorrhage, metformin