Question: The Challenge is a television show hosted by an athlete from what sport?

Context paragraphs:
The Sarah Millican Television Programme: The Sarah Millican Television Programme was a British comedic television show hosted by comedian Sarah Millican.  The show's central theme was a comical review of television programming (particularly British television).  Each episode featured as a topic a different genre of television; Millican would lampoon the topic genre in monologue segments that were inter-cut with jocular interviews of celebrities known for work within that genre.  Three series of the show were broadcast between early 2012 and late 2013.  An additional pilot episode was filmed on 25 May 2011, but never broadcast

Wedding Wars (TV series): Wedding Wars was a short-lived reality television show the ran on VH1 in which engaged couples compete to win their ultimate wedding.  The grand prize is a $100,000 wedding and a $25,000 nest egg.  The contestants live in a similar conditions as CBS' Survivor.  There is a gift challenge, in which couples compete in competitions and the winner wins a prize for their wedding, such as bouquets, tuxedos, and wedding dresses.  There is also a security challenge, in which couples compete in competitions and the winner is safe from elimination.  The winner of the security challenge receives a cake-topper (a mock-up model of the couple).  The couples then go to Couple's Chapel, a ceremony where couples vote off other couples, and the couple with the most votes is eliminated.  The show is hosted by Michele Merkin.

It's Not What You Know: It's Not What You Know (sometimes styled as Chris Tarrant's It's Not What You Know) is a game show hosted by Chris Tarrant, which aired on the British digital TV channel Challenge from 28 April to 6 June 2008.  The show was unusual as Challenge tends to air repeats of classic game shows that were originally commissioned by other broadcasters, very rarely producing original content.

Designer Superstar Challenge: Designer Superstar Challenge also known simply as "Superstar Challenge" is a show hosted by Karen Bertelsen on HGTV Canada that has had four seasons.  Similar to the American series "HGTV Design Star", the show features aspiring interior designers competing in a series of challenges, following which one contestant is named the "design superstar" at the end of the competition.

On the Ball (ITV television show): On the Ball is a British ITV Saturday lunchtime television show about football, which ran as part of "World of Sport" in the 1970s and 1980s, and as a stand-alone show from 1998 to 2004.  There was another ITV television show called "On the Ball" which was a game show hosted by Nick Weir in 1997, shown only in the Granada region.

League Sunday: League Sunday is an RTÉ Two Gaelic games television show hosted by Michael Lyster, featuring highlights from the National Football League and the National Hurling League.  It began on 13 February 2011, at 8:00pm as a replacement highlights show for "Sunday Sport".

The Challenge (TV series): The Challenge (originally known as Road Rules: All Stars, followed by Real World/Road Rules Challenge) is a reality game show on MTV that is spun off from the network's two reality shows, "Real World" and "Road Rules".  It features alumni from these two shows, in addition to first-time cast members called 'Fresh Meat', alumni from "Are You the One? ", and relatives of these cast members called 'Bloodlines', competing against one another for a cash prize.  "The Challenge" is currently hosted by T. J. Lavin.

The Apartment - Design Your Destiny: The Apartment - Design Your Destiny is a reality television show where 9 teams compete in an interior designing show hosted by Jamie Durie, and judged by both him and Laurence Llewelyn-Bowen.  Designed as a pressure stress test, teams will design and decorate a room each week.  At the end of the challenge, the winner will walk away with a brand new double-storey home at Elmina, Malaysia.  This reality television show is created by Riaz Mehta and produced by Imagine Group.

T. J. Lavin: Thomas Joseph "T. J." Lavin (born December 7, 1976) is an American BMX rider and the host of MTV's "The Challenge" since its eleventh season.

Shaq's Big Challenge: Shaq's Big Challenge is a reality television show hosted by Shaquille O'Neal that debuted on ABC with its first episode on June 26, 2007, and concluded its first season on July 31, 2007.  It featured Shaq's efforts to help six severely obese middle school aged children from Broward County, Florida lose weight and gain a healthy lifestyle.  It aired on Tuesdays at 9:00 pm ET/PT and 8:00 pm CT on ABC.

Supporting paragraphs: The Challenge (TV series) T. J. Lavin
Answer: BMX rider