What is the relationship between software company and software 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.

He has previously been a director of Revelytix Inc, (sold to Teradata), an enterprise data company, CEO of Eyeona a software company marketing a retail pricing application, Managing Director US Operations of ItemField, a venture backed startup (sold to Informatica), and Senior Vice President of Nastel Technologies, an enterprise software company.

Answer: product_or_material_produced