Utilize the input text as a context reference, choose the right relationship between 888 Holdings and gambling 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.

(Reuters) - Online gambling firm 888 Holdings (888.L) stepped up a billion pound battle for Bwin.party Digital Entertainment (BPTY.L) on Tuesday, submitting a revised takeover proposal as it looks to see off rival interest from GVC Holdings (GVC.L).

Answer: industry