Question: Rousey vs. Carmouche was a mixed martial arts event held by which American mixed martial arts organization based in Las Vegas, Nevada, that is owned and operated by parent company WME–IMG?

Context paragraphs:
UFC 184: UFC 184: Rousey vs. Zingano was a mixed martial arts event held on February 28, 2015, at Staples Center in Los Angeles, California.

UFC 157: UFC 157: Rousey vs. Carmouche was a mixed martial arts event held by the Ultimate Fighting Championship on February 23, 2013, at the Honda Center in Anaheim, California.

Shooto: Shooto is a combat sport/mixed martial arts system and mixed martial arts organization that is governed by the "Shooto Association" and the "International Shooto Commission".  Shooto was originally formed in 1985, as an organization and as a particular fighting system derived from shoot wrestling.  Practitioners are referred to as shooters, similarly to practitioners of shoot wrestling.  Shooto rules have evolved such that their events are now true mixed martial arts competitions.

Ultimate Fighting Championship: The Ultimate Fighting Championship (UFC) is an American mixed martial arts organization based in Las Vegas, Nevada, that is owned and operated by parent company WME–IMG.  It is the largest MMA promotion in the world and features the top-ranked fighters of the sport.  Based in the United States, the UFC produces events worldwide that showcase eleven weight divisions and abide by the Unified Rules of Mixed Martial Arts.  As of 2017, the UFC has held over 400 events.  Dana White serves as the president of the UFC.  He has held that position since 2001; while under the leadership of Dana White the UFC has grown into a globally popular multibillion-dollar enterprise.

Miesha Tate vs. Ronda Rousey: 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.

UFC 190: UFC 190: Rousey vs. Correia was a mixed martial arts event held on August 1, 2015, at the HSBC Arena in Rio de Janeiro, Brazil.

UFC 193: UFC 193: Rousey vs. Holm was a mixed martial arts event held on November 15, 2015, at Etihad Stadium in Melbourne, Australia.  It is the most attended UFC event in the history of the company, with 56,214 people filling the stadium.  Although Ronda Rousey was heavily favored to defeat Holly Holm, Holm gave Rousey her first career defeat.

2013 in UFC: The year 2013 is the 21st year in the history of the Ultimate Fighting Championship (UFC), a mixed martial arts promotion based in the United States.  2013 started with "UFC on FX: Belfort vs. Bisping".  2013 also saw the introduction of the women's bantamweight weight class with "UFC 157: Rousey vs. Carmouche".

Strikeforce: Rousey vs. Kaufman: Strikeforce: Rousey vs. Kaufman was a mixed martial arts event held by Strikeforce.  The event took place on August 18, 2012, at the Valley View Casino Center in San Diego, California.  It was broadcast live on Showtime and Showtime Extreme.

UFC 170: UFC 170: Rousey vs. McMann was a mixed martial arts held on February 22, 2014, at the Mandalay Bay Events Center in Las Vegas, Nevada.

Supporting paragraphs: UFC 157 Ultimate Fighting Championship
Answer: Ultimate Fighting Championship