Given the input sentence, please extract the subject and object containing a certain relation in the sentence according to the following relation types, in the format of "relation1: word1, word2; relation2: word3, word4". Relations include: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.
Text: "As the world's largest dedicated collaboration software and services provider, PGi has very specific operational requirements for managing our globally dispersed workforce and for continuing to improve our industry-leading customer service levels.
user
product_or_material_produced: PGi, software; industry: PGi, software
assistant