62
Five cases ( four from the literature and one new case ) are presented in which patients unsuspected of having vitamin B12 deficiency developed subacute combined degeneration of the spinal cord following nitrous oxide anesthesia .
 adverse effect: subacute combined degeneration of the spinal cord, nitrous oxide
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: subacute combined degeneration of the spinal cord, nitrous oxide