What is the relationship between Swissport and aviation in the context of the input sentence. Choose an answer from: 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.

Swissport provides ground-handling and cargo services to approximately 700 aviation customers, and was sold for more than $900m to PAI in 2010.

Answer: industry