9519
We present a case of respiratory failure occurring in a woman at 16 weeks ' gestation who was being treated with nitrofurantoin for a urinary tract infection .
 respiratory failure, nitrofurantoin
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 respiratory failure, nitrofurantoin