Question: The Red Pian Tour by Sir Elton John originated at a theatre that seats how many people?

Context paragraphs:
Garry Fabian Miller: Garry Fabian Miller (English, born in Bristol in 1957) is an internationally recognised photographic artist, specialising in ‘camera-less’ photographs since the mid-1980s.  He has exhibited extensively in Europe, Japan and America, and has work in many major collections such including the Metropolitan Museum, New York City, Victoria & Albert Museum, London, Ingelby Gallery Edinburgh and the Sir Elton John collection.

The Colosseum at Caesars Palace: The Colosseum at Caesars Palace is a theatre located on the Las Vegas Strip in Las Vegas, Nevada.  The theatre is the main entertainment venue for Caesars Palace.  Deemed the "Home of the Greatest Entertainers in the World", the theatre hosts numerous residency shows by Celine Dion, Elton John, Rod Stewart, Cher, Bette Midler, Shania Twain, and Mariah Carey.  Celine Dion has had the longest residency(1,110 shows as of June 2, 2018) at the venue grossing a total of $650 million since her arrival in 2003.  She also performed her record-breaking 1000th show at the venue on October 8, 2016.  The venue has an estimated seating capacity of 4,296 and is inspired by the architecture of ancient Rome along with aspects of contemporary architecture.  The cost of the theatre totaled $108 million, becoming the most expensive entertainment venue in Las Vegas, beating the "O" Theatre at the Bellagio Las Vegas.

The Red Piano: The Red Piano Tour was a concert tour by English singer-songwriter Sir Elton John.  The tour originated at The Colosseum at Caesars Palace in Las Vegas.  The idea for the show originated in 2004 by Elton John and David LaChapelle.

Elton John AIDS Foundation: The Elton John AIDS Foundation (EJAF) is a nonprofit organization, established by rock musician Sir Elton John in 1992 in the United States and 1993 in the United Kingdom to support innovative HIV prevention, education programs, direct care and support services to people living with HIV.

Elton John (album): Elton John is the second studio album by English singer-songwriter Elton John, released on 10 April 1970 by DJM Records.  It was released by Uni Records as John's debut album in the United States; many people there assumed it was his first album, as "Empty Sky" was not released in that country until 1975.  "Elton John" includes his breakthrough single "Your Song", and helped to establish his career during what was considered the "singer-songwriter" era of popular music.  In the US, it was certified gold in February 1971 by the Recording Industry Association of America (RIAA).  In the same year, it was nominated for the Grammy Award for Album of the Year.

Elton John: The Classic Years: Elton John: The Classic Years (known in North America as Elton John: The Remasters) was a remastering series of Sir Elton John's albums, in which some of the albums included bonus tracks.

Jumpers for Goalposts: Live at Wembley Stadium: Jumpers for Goalposts: Live at Wembley Stadium is a home video by English singer-songwriter Ed Sheeran, released on Blu-ray on 13 November 2015.  It features the footage taken from Sheeran's x Tour, when he became the first solo artist to take the stage at Wembley Stadium in London and played across three sold out nights to a crowd of 240,000 people.  "Jumpers for Goalposts: Live at Wembley Stadium" features performances of hits like "The A Team", "Sing" or "Thinking Out Loud".  Sir Elton John duets with Sheeran on two songs.  Aside from the live performances, "Jumpers for Goalposts: Live at Wembley Stadium" gives viewers an insight into life backstage on the road with Sheeran.  Simultaneously, "Jumpers for Goalposts: Live at Wembley Stadium" was released on DVD as part of the re-release of Sheeran's 2014 "x" album.  This CD/DVD combo titled "x (Wembley Edition)" also includes five new tracks on the CD portion.

Royal Academy of Music: The Royal Academy of Music in London, England, is the oldest conservatoire in the UK, founded in 1822 and receiving its Royal Charter in 1830.  It is one of the leading conservatoires in the world, coming top of the Complete University Guide for 2018 and Guardian University Guide for 2018.  Famous Academy alumni include Sir Simon Rattle, Sir Harrison Birtwistle, Sir Elton John and Annie Lennox.

Elton John: Tantrums &amp; Tiaras: Tantrums & Tiaras is a 1997 documentary film about the musician Sir Elton John, directed by his husband, David Furnish.  It was recorded during John's Made in England Tour in 1995 and includes parts of interviews and concerts.  Included in the documentary is a large part of a concert John performed in Rio de Janeiro, Brazil in November 1995.  In 1998, the documentary won a Chris Award at the Columbus Film and Video Festival.  It was also re-released on DVD in November 2008 as a "Director's Cut" with extra material.

Elton John: Sir Elton Hercules John, (born Reginald Kenneth Dwight; 25 March 1947), is an English singer, pianist, and composer.  He has worked with lyricist Bernie Taupin as his songwriting partner since 1967; they have collaborated on more than 30 albums to date.  In his five-decade career Elton John has sold more than 300million records, making him one of the best-selling music artists in the world.  He has more than fifty Top 40 hits, including seven consecutive No. 1 US albums, 58 "Billboard" Top 40 singles, 27 Top 10, four No. 2 and nine No. 1.  For 31 consecutive years (1970–2000) he had at least one song in the "Billboard" Hot 100.  His tribute single, re-penned in dedication to the late Princess Diana, "Candle in the Wind 1997" sold over 33million copies worldwide and is the best-selling single in the history of the UK and US singles charts.  He has also composed music, produced records, and has occasionally acted in films.  John owned Watford Football Club from 1976 to 1987, and 1997 to 2002.  He is an honorary Life President of the club, and in 2014 had a stand named after him at the club's home stadium.

Supporting paragraphs: The Red Piano The Colosseum at Caesars Palace
Answer: 4,296