1059
this film was taken by b-17 flight personnel during world war two as the two german saucers attacked a squadron of bombers .
 squadron, bombers
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: component whole, NA, instrument agency, member collection, cause effect, entity destination, content container, message topic, product producer, entity origin 
Text: {0} 
Answer:
 squadron, bombers