What is the relationship between 888 Holdings and gambling in the context of the input sentence. Choose an answer from: 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.

Sept 1 (Reuters) - Online gambling firm 888 Holdings stepped up a billion pound battle for Bwin.party Digital Entertainment on Tuesday, submitting a revised takeover proposal as it looks to see off rival interest from GVC Holdings (Other OTC: GMVHF - news ) .

Answer: industry