Utilize the input text as a context reference, choose the right relationship between Costa Group and Frank Costa from the options. Options: 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.

Costa Group chairman Frank Costa said the fruit and vegetable grower took comfort from the successful float of dairy processor Murray Goulburn.

Answer: founded_by