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part of new york city became an `` urban jungle '' -- as a swarm of bees descended on the busy union square park area .
 swarm, bees
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:
 swarm, bees