12991
A 62-year - old Caucasian man with atrial fibrillation who was taking warfarin reported an episode of hematochezia ; his international normalized ratio ( INR ) was 1.74 .
 adverse effect: hematochezia, warfarin
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: hematochezia, warfarin