The Ultimate Fighter 5 was the fifth season of the Ultimate Fighting Championship produced reality television series "The Ultimate Fighter".
 As with the show's usual format, sixteen prospective mixed martial arts fighters were secluded in a house near Las Vegas, Nevada and trained together while participating in a single-elimination tournament, with the winner being awarded a six-figure UFC contract.
 This season featured only one weight class, lightweights (146–155 lb) and the fighters were divided into two teams; one coached by former UFC Lightweight Champion Jens Pulver and the other by former UFC Welterweight Champion and former lightweight champion B.J. Penn.
 The season was well-known among fans for the large number of fighters kicked off of the show.
Nicholas Robert "Nick" Diaz (born August 2, 1983) is an American professional mixed martial artist who is currently signed with the Ultimate Fighting Championship (UFC).
 Since beginning his career in 2001, Diaz has competed in UFC, PRIDE, Strikeforce, EliteXC, World Extreme Cagefighting (WEC), DREAM, and Shooto.
 He is a former welterweight champion in Strikeforce and WEC, and is the older brother of Nate Diaz.
The debut season of The Ultimate Fighter (later designated The Ultimate Fighter 1) premiered on January 17, 2005.
 Sixteen mixed martial arts fighters (eight Light Heavyweights weighing from 186 to 205 lbs and eight Middleweights weighing from 171 to 185 lbs) were invited to participate in the show where they would reside together and train in two separate teams coached by UFC Light Heavyweight fighters Chuck Liddell and Randy Couture.
 The teams would compete in physical challenges, segments hosted by singer Willa Ford, to determine which team would have the right to pair one of their own fighters against an opponent of their choice in the same weight class, with the loser being eliminated.
WEC 12: Halloween Fury 3 was a mixed martial arts event promoted by World Extreme Cagefighting on October 21st, 2004 at the Tachi Palace Hotel & Casino in Lemoore, California.
 The card featured many future superstars such as Jason "The Punisher" Lambert, Nate Diaz, Brad Imes, Chris "Lights Out" Lytle, "The Sandman" James Irvin, Joe "Diesel" Riggs, Chael Sonnen, and MMA legend "Mr. International" Shonie Carter.
 The main event saw Doug Marshall take on Carlos Garcia.
Fight Life is a feature-length documentary on the sport of mixed martial arts.
 The film is directed by independent filmmaker James Z. Feng and produced by RiLL Films.
 The film focuses on the lives of professional mixed martial arts fighters outside the cage, primarily profiling Jake Shields, and Lyle Beerbohm.
 The film unveils the sport of Mixed martial arts and what it takes to be a modern-day professional fighter.
 Many notables MMA stars and experts are featured in this film, including: Nick Diaz, Gilbert Melendez, Chuck Liddell, Frank Shamrock, Miesha Tate, John McCarthy, Julianna Pena, Michael Chiesa, Herschel Walker, Sam Sheridan, Mark Coleman, Tyron Woodley, Ryan Schultz, Matt Lindland, Mike Swick, and Cody McKenzie.
 In 2013, "Fight Life" went on to win the Best Documentary Award at the United Film Festival.
Gustavo Falciroli (born 13 December 1982) is an Australian/Brazilian mixed martial artist.
 Brazilian born Gustavo has lived in Australia since 2007 and is an Australian citizen.
 Gustavo Falciroli is the reigning Cage Fighting Championship and Australian Fighting Championship bantamweight champions, one of the most decorated mixed martial arts fighters in Australia and a Brazilian jiu-jitsu black belt third degree.
WEC 24: Full Force was a mixed martial arts event held on October 12, 2006.
 "WEC 24"'s main event was a championship fight for the WEC Lightweight Title between champion Hermes Franca and challenger Nate Diaz.
Joseph Edward Lauzon Jr. (born May 22, 1984) is an American mixed martial artist competing in the UFC's Lightweight division.
 He is tied with Nate Diaz as having the most post-fight bonus awards in UFC history.
 Joe's younger brother, Dan Lauzon, is also a mixed martial artist.
Nathan Donald "Nate" Diaz (born April 16, 1985) is an American professional mixed martial artist currently competing for the Ultimate Fighting Championship (UFC).
 He was the winner of "The Ultimate Fighter 5".
 Diaz is the younger brother of former Strikeforce Welterweight Champion and WEC Welterweight Champion, Nick Diaz.
 Prior to signing with the UFC, Diaz competed in World Extreme Cagefighting, Strikeforce, and Pancrase.
 As of June 6th 2017, Diaz is #8 in official UFC lightweight rankings.
Team Hammer House is a mixed martial arts team operating out of Columbus, Ohio, made up of mostly former NCAA wrestlers.
 While Hammer House focuses on amateur wrestling they do have cross training deals with notable fighters and camps such as Matt Serra, Pat Miletich and Xtreme Couture Mixed Martial Arts.
 Founded by former UFC champion Mark Coleman, Team Hammer House has attracted such mixed martial arts fighters as Kevin Randleman and Phil Baroni.

Question: How many prospective mixed martial arts fighters are secluded in a house during the filming of a television series in which Nate Diaz won the fifth season of?
Answer: sixteen