Utilize the input text as a context reference, choose the right relationship between 'software company' and 'software' from the options.
Options: product/material produced, founded by, employer, manufacturer

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.
product/material produced