Utilize the input text as a context reference, choose the right relationship between 'partypoker' and 'online poker' from the options.
Options: distributed by, industry, employer, owner of

In June, the first ever WPT online poker open on the partypoker U.S. Network became the first WPT real money online gaming events to take place in the United States since the Unlawful Internet Gambling Enforcement Act was adopted in 2006.
industry