Betfair Group Plc (LSE: BET.L - news ) and Irish rival Paddy Power Plc (LSE: PAP.L - news ) , both licensees of Playtech, on Wednesday agreed to a 5 billion pound merger, to stake a claim to leadership of Britain's online gambling market.
Refer to the input text as context and select the correct relationship between 'Betfair' and 'online gambling' from the available options.
Options: industry, product/material produced, platform, distributed by