Question: When was the MGM Grand built in the city where American Idol contestants performed an additional round in seasons ten and eleven?

full_context: Document 1: MGM Springfield: MGM Springfield is a $960 million resort casino under construction in Springfield, Massachusetts. The casino, which is scheduled to open on August 24th, 2018, will be owned and operated by MGM Resorts International.
Document 2: The Wizard of Oz on television: MGM's 1939 musical fantasy film The Wizard of Oz was first shown in theatres that year, then re-released nationwide in 1949 and again in 1955. It was first broadcast on television on Saturday, November 3, 1956. The film was shown as the last installment of the CBS anthology series Ford Star Jubilee. Since that telecast, it has been shown respectively by CBS, NBC, the WB Network, and several of Ted Turner's national cable channels. It has never been licensed to any local affiliate broadcast TV station. From 1959 until 1991, it was an annual tradition on American commercial network television. During these years, and for several afterwards, it was always shown as a television special.
Document 3: MGM Grand Las Vegas: The MGM Grand Las Vegas (formerly Marina and MGM - Marina) is a hotel and casino located on the Las Vegas Strip in Paradise, Nevada. The MGM Grand is the largest single hotel in the United States with 6,852 rooms. It is also the third - largest hotel complex in the world by number of rooms and second - largest hotel resort complex in the United States behind the combined The Venetian and The Palazzo. When it opened in 1993, the MGM Grand was the largest hotel complex in the world.
Document 4: American Idol: With the exception of seasons one and two, the contestants in the semifinals onwards perform in front of a studio audience. They perform with a full band in the finals. From season four to season nine, the American Idol band was led by Rickey Minor; from season ten onwards, Ray Chew. Assistance may also be given by vocal coaches and song arrangers, such as Michael Orland and Debra Byrd to contestants behind the scene. Starting with season seven, contestants may perform with a musical instrument from the Hollywood rounds onwards. In the first nine seasons, performances were usually aired live on Tuesday nights, followed by the results shows on Wednesdays in the United States and Canada, but moved to Wednesdays and Thursdays in season ten.
Document 5: American Idol: The wildcard round returned in season eight, wherein there were three groups of twelve, with three contestants moving forward – the highest male, the highest female, and the next highest-placed singer - for each night, and four wildcards were chosen by the judges to produce a final 13. Starting season ten, the girls and boys perform on separate nights. In seasons ten and eleven, five of each gender were chosen, and three wildcards were chosen by the judges to form a final 13. In season twelve, the top twenty semifinalists were split into gender groups, with five of each gender advancing to form the final 10. In season thirteen, there were thirty semifinalists, but only twenty semifinalists (ten for each gender) were chosen by the judges to perform on the live shows, with five in each gender and three wildcards chosen by the judges composing the final 13.
Document 6: American Idol: Once in Hollywood, the contestants perform individually or in groups in a series of rounds. Until season ten, there were usually three rounds of eliminations in Hollywood. In the first round the contestants emerged in groups but performed individually. For the next round, the contestants put themselves in small groups and perform a song together. In the final round, the contestants perform solo with a song of their choice a cappella or accompanied by a band‍—‌depending on the season. In seasons two and three, contestants were also asked to write original lyrics or melody in an additional round after the first round. In season seven, the group round was eliminated and contestants may, after a first solo performance and on judges approval, skip a second solo round and move directly to the final Hollywood round. In season twelve, the executive producers split up the females and males and chose the members to form the groups in the group round.
Document 7: The Wiz (film): The next morning, Dorothy happens upon a Scarecrow (Michael Jackson) made of garbage and rags, and saves him from being viciously teased and picked on by a group of humanoid crows and whom she befriends. The two of them discover the yellow brick road and happily begin to follow it together. The Scarecrow hopes the Wizard might be able to give him the one thing he feels that he lacks -- a brain. Along the way to the Emerald City, Dorothy, Toto, and the Scarecrow meet the Tin Man (Nipsey Russell), in an abandoned early 20th - century amusement park and the Cowardly Lion (Ted Ross), a vain dandy banished from the jungle who hid inside one of the stone lions in front of the New York Public Library. The Tin Man and Lion join them on their quest to find the Wizard, hoping to gain a heart and courage, respectively. Before the five adventurers reach the Emerald City, they must face obstacles such as a deadly subway where they meet a crazy subway peddler (a homeless man) who unleashes evil puppets in his control. They narrowly escape the subway and then encounter the ``Poppy ''Girls (a reference to the poppy field from the original story), flamboyant prostitutes who attempt to put Dorothy, Toto, and the Lion into an eternal sleep with magic poppy perfume.
Document 8: American Idol: In seasons ten and eleven, a further round was added in Las Vegas, where the contestants perform in groups based on a theme, followed by one final solo round to determine the semi-finalists. At the end of this stage of the competition, 24 to 36 contestants are selected to move on to the semi-final stage. In season twelve the Las Vegas round became a Sudden Death round, where the judges had to choose five guys and five girls each night (four nights) to make the top twenty. In season thirteen, a new round called "Hollywood or Home" was added, where if the judges were uncertain about some contestants, those contestants were required to perform soon after landing in Los Angeles, and those who failed to impress were sent back home before they reached Hollywood.
Document 9: American Idol: The most popular contestants are usually not revealed in the results show. Instead, typically the three contestants (two in later rounds) who received the lowest number of votes are called to the center of the stage. One of these three is usually sent to safety; however the two remaining are not necessarily the bottom two. The contestant with the fewest votes is then revealed and eliminated from the competition. A montage of the eliminated contestant's time on the show is played and they give their final performance. However, in season six, during the series' first ever Idol Gives Back episode, no contestant was eliminated, but on the following week, two were sent home. Moreover, starting in season eight, the judges may overturn viewers' decision with a "Judges' Save" if they unanimously agree to. "The save" can only be used once, and only up through the top five. In the eighth, ninth, tenth, and fourteenth seasons, a double elimination then took place in the week following the activation of the save, but in the eleventh and thirteenth seasons, a regular single elimination took place. The save was not activated in the twelfth season and consequently, a non-elimination took place in the week after its expiration with the votes then carrying over into the following week.
Document 10: Flamingo Las Vegas: The property includes a 72,299 - square - foot (6,716.8 m) casino along with 3,626 hotel rooms. The 15 - acre (6.1 ha) site's architectural theme is reminiscent of the Art Deco and Streamline Moderne style of Miami and South Beach. Staying true to its theme, the hotel includes a garden courtyard which serves as a wildlife habitat for flamingos. The hotel was the third resort to open on the Strip and remains the oldest resort on the Strip in operation today. The Flamingo has a Las Vegas Monorail station called the Flamingo & Caesars Palace station at the rear of the property. After opening in 1946, it has undergone a number of ownership changes.
Document 11: MGM Grand Las Vegas: When the latest MGM Grand opened on December 18, 1993, it was owned by MGM Grand Inc. At that time it had an extensive Wizard of Oz theme, including the green ``Emerald City ''color of the building and the decorative use of Wizard of Oz memorabilia. After entering the casino's main entrance, one would find themselves in the Oz Casino facing Emerald City. Dorothy, the Scarecrow, the Tin Man, and the Cowardly Lion were seen in front of the city. The Emerald City attraction featured an elaborate yellow brick road walk - through, complete with the cornfield, apple orchard, and haunted forest, as well as audio - animatronic figures of Dorothy, the Scarecrow, the Tin Man, the Cowardly Lion, and the Wicked Witch of the West. It would end at the door of the city, leading inside for a performance of`` The Wizard's Secrets''. When MGM Grand began its extensive refurbishment in 1996, the Oz Casino was the first to go. The Emerald City was completely demolished, and the Emerald City Gift Shop was moved to a new shopping section of the casino. The store remained open until early 2003.
Document 12: American Idol: The finals are broadcast in prime time from CBS Television City in Los Angeles, in front of a live studio audience. The finals lasted eight weeks in season one, eleven weeks in subsequent seasons until seasons ten and eleven which lasted twelve weeks except for season twelve, which lasted ten weeks, and season thirteen, which lasted for thirteen weeks. Each finalist performs songs based on a weekly theme which may be a musical genre such as Motown, disco, or big band, songs by artists such as Michael Jackson, Elvis Presley or The Beatles, or more general themes such as Billboard Number 1 hits or songs from the contestant's year of birth. Contestants usually work with a celebrity mentor related to the theme. In season ten, Jimmy Iovine was brought in as a mentor for the season. Initially the contestants sing one song each week, but this is increased to two songs from top four or five onwards, then three songs for the top two or three.
Document 13: America's Got Talent: During the live shows, a group of acts ranging from only a Top 20 (season two), to as many as 60, compete for viewers' and judges' votes. In the first season, the judges could not end an act's performance, but could either ``check ''or`` X'' the performance during their critique. Since season two (2007), judges have been able to end an act's performance early, and the ``check ''was removed. Generally, acts each perform first in a live round consisting of a series of quarterfinals. In seasons with YouTube auditions, the round of live judging of YouTube finalists takes place then, as part of these quarterfinals. Then there may be additional shows for`` Wild Card'' acts -- acts that one or more of the judges select to be given one more chance for audience vote despite previous elimination. From these shows, the existing group is narrowed through votes by the public and / or the judges (depending on the season). Acts then move on to a semifinal round, and even further rounds (such as a ``Top 8 ''or a`` Top 10'', depending on the season) through a series of weekly shows, which trim the number of acts down each time based on a public vote. In the majority of seasons, judges have had no vote from the semifinals. All these rounds culminate in a live final, which has consisted of anywhere from four to ten acts throughout the seasons. The act with the most votes is declared the winner, given $1 million, and, since season three (2008), a chance to headline a show on the Las Vegas Strip.
Document 14: Atlantic City, New Jersey: Owing to economic conditions and the late 2000s recession, many of the proposed mega casinos never went further than the initial planning stages. One of these developers was Pinnacle Entertainment, who purchased the Sands Atlantic City, only to close it permanently November 11, 2006. The following year, the resort was demolished in a dramatic, Las Vegas styled implosion, the first of its kind in Atlantic City. While Pinnacle Entertainment intended to replace it with a $1.5–2 billion casino resort, the company canceled its construction plans and plans to sell the land. The biggest disappointment was when MGM Resorts International announced that it would pull out of all development for Atlantic City, effectively ending their plans for the MGM Grand Atlantic City.
Document 15: American Idol: In the audition rounds, 121 contestants were selected from around 10,000 who attended the auditions. These were cut to 30 for the semifinal, with ten going on to the finals. One semifinalist, Delano Cagnolatti, was disqualified for lying to evade the show's age limit. One of the early favorites, Tamyra Gray, was eliminated at the top four, the first of several such shock eliminations that were to be repeated in later seasons. Christina Christian was hospitalized before the top six result show due to chest pains and palpitations, and she was eliminated while she was in the hospital. Jim Verraros was the first openly gay contestant on the show; his sexual orientation was revealed in his online journal, however it was removed during the competition after a request from the show producers over concerns that it might be unfairly influencing votes.
ground_truth: December 18, 1993
sub_queries: In what city did contestants perform an additional round in seasons ten and eleven? Answer: Las Vegas
when was the mgm grand built in Las Vegas Answer: December 18, 1993