Utilize the input text as a context reference, choose the right relationship between Comcast and Brian Roberts 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.

Comcast Chief Executive Brian Roberts told reporters there were no plans for an IPO in the near term, but added a new board would revisit the idea.

Answer: chief_executive_officer