(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).
Take context from the input text and decide on the accurate relationship between '888 Holdings' and 'gambling' from the options provided.
Options: founded by, industry, creator, chief executive officer