6437
the software lets the teleworker closely associate his ip soft phone with other public switched telephone network ( pstn ) connections .
 software, teleworker
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:
 software, teleworker