2179
Pulmonary fibrosis is a severe complication associated with bis - chloronitrosourea ( BCNU ) therapy .
 Pulmonary fibrosis, BCNU; Pulmonary fibrosis, bis - chloronitrosourea
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:
 Pulmonary fibrosis, BCNU; Pulmonary fibrosis, bis - chloronitrosourea