Question: XHamster is the third most popular pornography site after what other site registered to WGCZ Holding?

full_context: Document 1: XVideos: XVideos is the world's largest pornographic video sharing and viewing website. It's registered to the Polish company, WGCZ Holding. Alexa ranks it as the 50th most visited website in the world.
Document 2: The Sex Factor: The Sex Factor is an online reality TV series produced by xHamster where eight men and eight women compete to become a porn star. The sixteen contestants supposedly have never had sex on camera prior to the series. The show stars Asa Akira as the host, and also features Lexi Belle, Tori Black, Remy LaCroix, and Keiran Lee as mentors and judges. Belle Knox was initially going to host the show, but was replaced by Akira.
Document 3: AXXo: aXXo is the Internet alias of an individual who released and standardized commercial film DVDs as free downloads on the Internet between 2005 and 2009. The files, which were usually new films, were popular among the file sharing community using peer-to-peer file sharing protocols such as BitTorrent. A download-tracking firm BigChampagne found - in a sampling period in late 2008 - that almost 33.5% of all movie downloads were aXXo torrents. aXXo encoded files to approximately 700 MB – the same size for a compact disc. Due to the re-encoded quality of an aXXo file, the suffix "aXXo" was often used by imitators.
Document 4: Pornhub: Pornhub is a pornographic video sharing website and the largest pornography site on the Internet. Pornhub was launched in Montreal, providing professional and amateur photography since 2007. Pornhub also has offices and servers in San Francisco, Houston, New Orleans and London. In March 2010, Pornhub was bought by Manwin (now known as MindGeek), which owns numerous other pornographic websites.
Document 5: Populis: Populis is an international online publishing company producing content for 550 websites and blogs across eight European languages. Populis produces over 35,000 articles and videos in English, French, German, Italian, Portuguese, Spanish and Swedish. They receive 26.1 million monthly unique visitors across their websites and blogs. In 2010, they achieved revenues of 58 million euros. Populis specializes in writing content for different audiences and sectors including women’s interests, personal finance, automobile, travel and fashion.
Document 6: YouPorn: YouPorn is a free pornographic video sharing website and one of the 100 most accessed websites in the world. Since launching in August 2006, it grew to become the most popular pornographic website on the internet, and, in November 2007, it was reported to be the largest free pornographic website as well. As of February 2013, it was the 83rd most popular website overall and the fifth most popular pornographic website. In the category of pornographic websites, it was surpassed in the rankings by competitor sites xHamster, XVideos, and Pornhub, as well as the adult webcam site LiveJasmin.
Document 7: Insex: Insex was one of the biggest BDSM pornographic websites on the Internet and arguably the most extreme American pornographic production featuring female submissives. It was also a leading innovator in both live video streaming, pioneering the concept before broadband Internet access existed, and in the depiction of BDSM practices on the Internet. It existed from 1997 to 2005 and was run by "Intersec Interactive Inc.", a company owned by the website's creator, Brent Scott, former Carnegie Mellon professor, known as "pd". Insex developed a cult following among BDSM enthusiasts due to its uncommonly severe and realistic depiction of sadomasochistic practices. It was also known for its interactive "Live Feeds" which allowed members to make direct suggestions and requests. In late 2006, Insex ended the production of original material, citing increased pressure from conservatives within the U.S. Justice Department.<ref name="BD/SM Internet Sites Under Attack">McMillan, Dennis. BD/SM Internet Sites Under Attack. San Francisco Bay Times. December 22, 2005.</ref>
Document 8: Partypoker: partypoker (formerly stylized PartyPoker) is an online poker card room. Launched in 2001 by PartyGaming, the site has had up to 80,000 players logged-in and was the largest online card room until 2006. In 2011 PartyGaming merged with bwin to form Bwin.Party Digital Entertainment. As of 2017, it remains among the largest online poker card rooms. The site is endorsed by Mike Sexton, the host of the World Poker Tour television show. The domain "partypoker.com" attracted at least 3.6 million visitors annually by 2008 according to a Compete.com study. In 2016, after a protracted bidding process between 888 Holdings and GVC Holdings, Bwin.Party Digital Entertainment accepted GVC Holdings' bid for £1.1 billion. Today, the site is run by GVC Holdings and is available in 14 different languages. In addition to partypoker.com, partypoker also offers dedicated networks for French and Italian based players via partypoker.fr and partypoker.it, respectively. GVC Holdings also acquired Partycasino during the 2011 merger of Party Gaming.
Document 9: Brazzers: Brazzers ( ) is a pornographic production company based in Montreal, Canada. With an online network consisting of thirty-one hardcore pornography websites, the company's slogan is “The World's Best HD Porn Site!”. As of October 2015, Brazzers.com has a traffic ranking of 1,650.
Document 10: Pink Erotic: Pink Erotic are a subscription based cable pay-TV adult entertainment television channels (Pink Erotic 1, Pink Erotic 2, Pink Erotic 3, Pink Erotic 4, Pink Erotic 5, Pink Erotic 6, Pink Erotic 7 and Pink Erotic 8) owned by the Serbian company Pink Media Group.
Document 11: Tudou: Tudou, Inc. () is a video-sharing website headquartered in Shanghai, China, where users can upload, view and share video clips. Tudou went live on April 15, 2005 and by September 2007 served over 55 million videos each day.
Document 12: Caballero Home Video: Caballero Home Video is an American pornographic film studio, based in Canoga Park, California founded by Noel C. Bloom. It was previously known as Caballero Control Corporation. The company was founded in 1974, making it one of the oldest U.S. porn studios still in existence. Caballero was one of the largest studios during the Golden Age of Porn, and produced several of the best-selling and most critically acclaimed pornographic films of the 1980s and early 1990s. Its dominance of the adult video market saw it called the "General Motors of Porn". Its films starred some of the most successful and best known performers of the period, such as Marilyn Chambers, Seka, Amber Lynn, Ginger Lynn, John Holmes, Joey Silvera, Traci Lords, Nina Hartley, Ron Jeremy and Christy Canyon. Previous company Presidents include Al Bloom. Throughout the 1980s it was awarded hundreds of thousands of dollars in damages due to its films being illegally pirated. It also acquired the U.S. rights to rival studio Cal Vista's entire catalogue of more than 150 films. Caballero is a contributor to the Free Speech Coalition.
Document 13: FetLife: FetLife is a social networking website that serves people interested in BDSM, fetishism, and kink. On its homepage, FetLife describes itself as, "Like Facebook, but run by kinksters like you and me." FetLife distinguishes itself from competitors by emphasizing itself as a social network rather than a dating site. FetLife is not dedicated to any particular sexual orientation or gender; everyone is welcome. Fetlife has over 5 million user accounts.
Document 14: XHamster: xHamster is a pornographic media and social networking site headquartered in Limassol, Cyprus. xHamster serves user-submitted pornographic videos, webcam models, pornographic photographs, and erotic literature, and incorporates social networking features. xHamster was founded in 2007. With more than 10 million members, it is the third most popular pornography website on the Internet after XVideos and Pornhub.
Document 15: Sugardaddyforme.com: Sugardaddyforme.com is an online dating site for sugar daddies and sugar babies (see Age disparity in sexual relationships). In 2013 the dating site had over 4 million members and over 2,000 new sugar daddy and sugar baby profiles every day. The website gets 1.5 million unique new visitors every month. The age range for women is predominantly 18-45 and for men the age range is predominantly 25-60.
ground_truth: XVideos