Question: What is the ranking of the site that YouPorn surpassed 

Context paragraphs:
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.

Nicol David: Datuk Nicol Ann David (born 26 August 1983) is a Malaysian female professional squash player, currently ranked world number 6.  Beginning in August 2006, David was the world number one for a record-breaking 108 consecutive months, finally ceding the ranking in September 2015 to Raneem El Weleily.  She has won the World Open title a record 8 times in 2005, 2006, 2008, 2009, 2010, 2011, 2012 and 2014, as well as the British Open title in 2005, 2006, 2008, 2012 and 2014.  In July 2016, she reached her 151st successive month in the top 10, breaking the record in both men's and women's categories.  She surpassed Peter Nicol's previous records of 150 months.

Rui Machado: Rui Machado (born April 10, 1984 in Faro) is a Portuguese retired professional tennis player who is regarded as one of the best Portuguese players of all time.  In October 2011, he achieved a career-high singles world ranking at 59, at the time the highest ranking a Portuguese player had ever held (since surpassed by João Sousa).

Webometrics Ranking of Business Schools: The Webometrics Ranking of Business Schools, also known as Ranking Web of Business Schools, is a ranking system for the world's Business Schools based on a composite indicator that takes into account both the volume of the Web contents (number of web pages and files) and the visibility and impact of these web publications according to the number of external inlinks (site citations) they received.  The ranking is published by the Cybermetrics Lab, a research group of the Spanish National Research Council (CSIC) located in Madrid.

Ai Sugiyama: Ai Sugiyama (杉山愛 , Sugiyama Ai , born July 5, 1975) is a Japanese former professional tennis player.  She reached No. 1 in women's doubles on the WTA Tour.  Her career-high singles ranking was No. 8, achieved on February 9, 2004.  In her career, she won 6 singles titles and 37 doubles titles, including three Grand Slam women's doubles titles (one with Frenchwoman Julie Halard-Decugis and two partnering Belgian Kim Clijsters).  Sugiyama held the all-time record, for both male and female players, for her 62 consecutive Grand Slam main draw appearances, until she was surpassed by Roger Federer at the 2015 Wimbledon Championships.

University of Oslo: The University of Oslo (Norwegian: "Universitetet i Oslo" ), until 1939 named the Royal Frederick University (Norwegian: "Det Kongelige Frederiks Universitet" ), is the oldest university in Norway, located in the Norwegian capital of Oslo.  Until 1 January 2016 it was the largest Norwegian institution of higher education in terms of size, now surpassed only by the Norwegian University of Science and Technology.  The Academic Ranking of World Universities has ranked it the 58th best university in the world and the third best in the Nordic countries.  In 2015, the Times Higher Education World University Rankings ranked it the 135th best university in the world and the seventh best in the Nordics.  While in its 2016, Top 200 Rankings of European universities, the Times Higher Education listed the University of Oslo at 63rd, making it the highest ranked Norwegian university.

Judit Polgár: Judit Polgár (born 23 July 1976) is a Hungarian chess grandmaster.  She is generally considered the strongest female chess player of all time.  In 1991, Polgár achieved the title of Grandmaster at the age of 15 years and 4 months, at the time the youngest to have done so, breaking the record previously held by former World Champion Bobby Fischer.  She was the youngest ever player to break into the FIDE Top 100 players rating list, ranking No. 55 in the January 1989 rating list, at the age of 12.  She is the only woman to qualify for a World Championship tournament, having done so in 2005.  She is the first, and to date only, woman to have surpassed 2700 Elo, reaching a career peak rating of 2735 and peak world ranking of No. 8, both achieved in 2005.  She was the No. 1 rated woman in the world from January 1989 until the March 2015 rating list, when she was overtaken by Chinese player Hou Yifan; she was the No. 1 again in the August 2015 women's rating list, in her last appearance in the FIDE World Rankings.

Webometrics Ranking of World Universities: The Webometrics Ranking of World Universities, also known as Ranking Web of Universities, is a ranking system for the world's universities based on a composite indicator that takes into account both the volume of the Web contents (number of web pages and files) and the visibility and impact of these web publications according to the number of external inlinks (site citations) they received.  The ranking is published by the Cybermetrics Lab, a research group of the Spanish National Research Council (CSIC) located in Madrid.

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.

Miles from Tomorrowland: Miles from Tomorrowland (titled Miles From Tomorrow in the UK) is a CGI animated Disney Junior series.  The series aired as shorts from January 19 to 23 before officially premiering on February 6, 2015.  A total of 24 episodes, each consisting of two 11-minute stories, had been ordered for the first season.  by Disney–ABC Television Group using data from Nielsen, across Q3 of 2015 (6/29 through 9/27), Miles from Tomorrowland was the fourth highest-rated series across preschooler-dedicated TV networks in the USA with 653,000 total viewers ages 2+ who watched the show on Disney Junior.  This ranking was surpassed only by PJ Masks (767,000), Sofia the First (667,000), and Mickey Mouse Clubhouse (666,000), all Disney Junior shows as well.

Supporting paragraphs: YouPorn XVideos
Answer: 50th