Question: Who, born in 1982, was the main card for the fourth mixed martial arts event "Strikeforce: Triple Threat"?
Context: UFC 110: Nogueira vs. Velasquez was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on Sunday, 21 February 2010 in Sydney, Australia, at Acer Arena.  The event marked the UFC's first trip to Australia.  The main card was scheduled for 2:00 pm Sunday in Sydney to cater to the U.S. audience, meaning that the event took place at the regular U.S. time (10:00 pm ET, on Saturday 20 February). Gina Joy Carano (born April 16, 1982) is an American actress, television personality, fitness model, and former mixed martial artist. Strikeforce/M-1 Global: Fedor vs. Silva was a mixed martial arts event promoted by Strikeforce in association with M-1 Global.  It took place on February 12, 2011 at the Izod Center in East Rutherford, New Jersey.  The main card of this event was broadcast live on Showtime, while the preliminary card was broadcast live on HDNet. EliteXC: Destiny was the inaugural mixed martial arts event by the mixed martial arts organization EliteXC.  The event took place on Saturday, February 10, 2007 at the DeSoto Civic Center in Southaven, Mississippi.  The main card aired on Showtime, with the undercard was streamed live on the Proelite.com website. Strikeforce: Overeem vs. Werdum, was a mixed martial arts event held by Strikeforce.  The event took place on June 18, 2011 at the American Airlines Center in Dallas, Texas.  The main card aired on Showtime while the preliminary card aired on HDNet. UFC 146: dos Santos vs. Mir was a mixed martial arts (MMA) pay-per-view event (PPV) promoted by the Ultimate Fighting Championship (UFC) on May 26, 2012 at the MGM Grand Garden Arena in Las Vegas, Nevada.  The main card featured five MMA bouts which were shown on PPV, as well as seven preliminary bouts which were shown on FX, and Facebook.  This was the first time in UFC history that the main card featured all heavyweight bouts.  It was the twelfth UFC event of 2012. Strikeforce/M-1 Global: Fedor vs. Rogers was a mixed martial arts event held on November 7, 2009 promoted by Strikeforce in association with M-1 Global.  It was the first MMA event on network television since the now-defunct EliteXC promotion broadcast its final event, , on CBS on October 4, 2008.  The event had a four-fight main card with a broadcasting team of Gus Johnson, Frank Shamrock and Mauro Ranallo.  The event drew an estimated 4,040,000 viewers, with a peak at 5,460,000 on CBS. Miesha Tate vs. Ronda Rousey was a series of mixed martial arts bouts booked by Strikeforce and the Ultimate Fighting Championship (UFC).  In 2011, the fighters began a rivalry via social media and a series of interviews, with Rousey expressing an interest in fighting Tate for Tate's Strikeforce Women's Bantamweight Championship.  As the feud garnered increased attention from fans and the press, Tate and Rousey were ultimately chosen to headline a Strikeforce show on March 3, 2012.  This marked a rare occurrence of women being placed in the main event of a mixed martial arts (MMA) card. Strikeforce: Shamrock vs. Baroni was a mixed martial arts event co-promoted by Strikeforce and EliteXC.  The event took place on Friday, June 22, 2007 at the HP Pavilion in San Jose, California.  The main card aired on pay-per-view, with the undercard streamed live on ProElite.com.  The PPV event was rebroadcast on the Showtime premium cable channel on June 30, 2007. Strikeforce: Triple Threat was the fourth mixed martial arts event promoted by Strikeforce.  The event took place at the HP Pavilion at San Jose in San Jose, California on December 8, 2006.  The main card featured the Strikeforce debut of Gina Carano.
Answer: Gina Carano