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We report a 78-year - old man who had acute unilateral total visual loss after retrogasserian phenol injection for the treatment of trigeminal neuralgia .
 adverse effect: acute unilateral total visual loss, phenol
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: acute unilateral total visual loss, phenol