4359
a few crappie on tuesday ( june 24 ) were found among flooded willow trees , presumably feeding on the recent hatch of mayflies ( willow flies ) that occurred on sunday and monday .
 member collection: hatch, mayflies
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: component whole, NA, instrument agency, member collection, cause effect, entity destination, content container, message topic, product producer, entity origin 
Text: {0} 
 Entity Pairs:  hatch, mayflies 
Answer:
 member collection: hatch, mayflies