Question: In what city did the Salvadorian model born on August 4, 1994 win the Miss Universe pageant?
Context: Anastasia Chernova (Ukrainian: Анастасія Чернова, born November 2, 1993) is a Ukrainian teacher, model and beauty pageant titleholder who was crowned Miss Ukraine Universe 2012 in October 2012 and represented Ukraine in the 2012 Miss Universe pageant.  2004 Miss Ukraine Universe winner Oleksandra Nikolayenko helped her prepare for the Miss Universe pageant.  Ukrainian designer Anastasiya Sukhanov created the traditional Cossack-inspired dress that Chernova wore at the competition. Miss Universe 2015, the 64th Miss Universe pageant, was held on 20 December 2015 at The AXIS in Las Vegas, Nevada, United States.  Paulina Vega of Colombia crowned her successor Pia Wurtzbach of the Philippines at the end of the event.  80 contestants competed for the crown. On 4 April 2008, Fadil Berisha - photographer of Miss Universe’s official photos - hosted Kosovo's inaugural pageant where Zana Krasniqi was crowned.  She went on represent Kosovo at the Miss Universe pageant.  This was the first appearance in a Miss Universe pageant for Miss Kosovo following the country's declaration of independence on February 17, 2008. The Miss Universe Thailand (Thai: มิสยูนิเวิร์สไทยแลนด์) is a beauty pageant that has been held every year since 2000.  The pageant was originally called Miss Thailand Universe.  In 2012 name of the pageant was changed to Miss Universe Thailand, with winners competing in the Miss Universe pageant.  Accordingly, "Miss Universe Thailand" is not related to the previous franchises of Miss Thailand or Miss Thailand World. Renate Veronica Cerljen (born March 26, 1988 in Staffanstorp, Sweden) is the first ever winner of the Miss Universe Sweden pageant which she won on June 6, 2009.  Cerljen represented Sweden at the Miss Universe 2009 pageant on the Bahamas on August 23, 2009 and placed in the Top 15.  Renate was the first non-winner of the Miss Sweden pageant since 1952 to represent Sweden at Miss Universe since Miss Sweden lost its rights to crown a contestant for Miss Universe earlier in 2009.  Cerljen was also the first delegate from Sweden at the international final since 2006 when Josephine Alhanko placed in the Top 20.  Miss Universe 1984 winner Yvonne Ryding was among the judges in the final which crowned Cerljen as winner.  By making the Top 15 Cerljen became Sweden's 29th semifinalist at the Miss Universe pageant overall.  In May 2010 Cerljen placed fifth in the Miss Beauty of the World pageant in China.  Cerljen was a judge at the Miss Sinergy competition for breast cancer in 2009 as well as 2010 which is an annual pageant made by the Sinergy group, held at the House of Sweden in Washington DC, United States. Señorita México was the name of a national beauty pageant in Mexico, celebrated since 1952.  After 2005, the pageant changed its name to "Miss Mexico".  From 1952 to 1994, was the official pageant responsible for sending the country's representatives to the Miss Universe, Miss World, Miss International and other international pageants.  After the crowning of Lupita Jones, as the country's first Miss Universe, a dispute between Miss Jones and the pageant organizers over overdued prizes, led to a break of the longtime association between the pageant and the broadcast network Televisa.  When the pageant moved to another network TV Azteca, a competing pageant called "Nuestra Belleza México" was created, later directed by Miss Jones with the sponsorship of the Televisa TV Network.  in 1994 Señorita México lost the bid to Nuestra Belleza México to be the official pageant for the Miss Universe pageant.  Later Nuestra Belleza México also obtained the rights of sending Mexico's representatives to Miss World and Miss International.  However, the "Miss Mexico" pageant still sends representatives to other international pageants.  The trade name Señorita Mexico was trademarked in the United States, by Venezuelan Entrepreneur Adan S. Perez CEO of The Miss Mexico Organization with headquarters in Las Vegas Nevada who produces The Señorita Mexico U.S. beauty pageant.  He developed a franchise system in every state of The Union to bring girls from all over the United States to compete in national beauty event which takes place every year in Las Vegas.  Adan Perez has been producing the national competition Señorita Mexico U.S in Las Vegas, since the year of 2003. Miss Universe Singapore (previously called Miss Singapore) is a national beauty pageant in Singapore and organised by Miss Universe Singapore Organisation to select the country's representative to the Miss Universe pageant.  Between 2001 and 2007, the contest was telecast 'live' by the local television station Mediacorp's Channel 5.  Miss Universe Singapore Organisation holds the license to oversee and produce the Miss Universe Singapore pageant (2015).  Prior to 2015, the contest was organised by Derrol Stepenny Promotions. Claudia Patricia Murillo (born in 1993) is a Salvadorian model and beauty pageant titleholder.  She was crowned Nuestra Belleza El Salvador 2014 and represented her country at the Miss Universe 2014 pageant.  She was coined as the "Mesoamerican Queen" by her fans due to her alluring Native American physical features, as well as her national costume where she portrayed the Siguanaba mythology.  Patricia was born in the town of Juayúa, which means "River of purple orchids", in Native American Pipil language.  Although Patricia did not place in Miss Universe, she was a fan favorite, gaining a lot of media attention and is considered one of the most memorable Miss El Salvador and Central American beauty queen in recent history due to her beauty and performance. Jackeline Rodríguez Streffeza (born January 12, 1972) is a Venezuelan model and beauty queen who was the official representative of her country to the 1991 Miss Universe pageant held in Las Vegas, Nevada on May 17, 1991, where she was one of Top 6 finalists.  Rodríguez was not a titleholder of the Miss Venezuela pageant.  That year, the 1991 Miss Venezuela pageant was moved to September, thus taking place after the 1991 Miss Universe pageant.  Rodríguez was ultimately chosen by Osmel Sousa to represent Venezuela at Miss Universe. Fátima Idubina Rivas Opico (born in August 4, 1994) is a Salvadorian model and beauty pageant titleholder who was appointed Miss Universe El Salvador 2015 and the winner of Reinado de El Salvador in 2013.  She represented her country at the Miss Universe 2015 pageant.
Answer: Las Vegas, Nevada