Question: The person who wrote the music for the original Russian romantic ballet "Swan Lake" was born in what year?

Context paragraphs:
Swan Lake (Bourne): Matthew Bourne's "Swan Lake" was first staged at Sadler's Wells theatre in London in 1995.  The longest running ballet in London's West End and on Broadway, it has been performed in the UK, Los Angeles, Europe, Australia, South Korea, Japan, Israel and Singapore.  The story is based on the Russian romantic ballet "Swan Lake", from which it takes the music by Tchaikovsky and the broad outline of the plot.  Bourne's rendering is best known for having the traditionally female parts of the swans danced by men.

Pyotr Ilyich Tchaikovsky: Pyotr Ilyich Tchaikovsky ( ; Russian: Пётр Ильи́ч Чайко́вский ; 25 April/7 May 1840 – 25 October/6 November 1893), often anglicized as Peter Ilich Tchaikovsky, was a Russian composer of the romantic period, some of whose works are among the most popular music in the classical repertoire.  He was the first Russian composer whose music made a lasting impression internationally, bolstered by his appearances as a guest conductor in Europe and the United States.  Tchaikovsky was honored in 1884, by Emperor Alexander III, and awarded a lifetime pension.

Swan Lake, Mississippi: Swan Lake is an unincorporated community located in Tallahatchie County, Mississippi.  Swan Lake is approximately 4 mi north of Glendora and 7 mi south of Webb along Swan Lake Road.  Swan Lake has a post office with ZIP code 38958.  It is unclear when Swan Lake became an official community, but it was thought to be in the early to mid 20th century.  It was started by a wealthy farmer named Bob Flautt.  His labor and cotton gin were located in the most central part of his plantation.  Swan Lake is actually the name of a lake about a mile north of the gin lot.  Eventually the name was given to the plantation.  Catfish ponds were eventually built that would parallel the gin lot.  A small crop dusting airport would be installed as well as a store and post office.

Swan Lake (Martins): Swan Lake is a two-act ballet made by New York City Ballet (NYCB) ballet master in chief Peter Martins (after Marius Petipa, Lev Ivanov, and George Balanchine) to Tschaikovsky's eponymous music (1875–56).  The premiere took place 27 October 1996, with the Royal Danish Ballet at the Royal Theatre, Copenhagen; the NYCB premiere was 29 April 1999 at the New York State Theater, Lincoln Center.  Peter Martins' wife, NYCB principal dancer Darci Kistler, chose to include the final act of "Swan Lake" in her farewell performance, Sunday, 27 June.

Swan River (New York): The Swan River flows south from Swan Lake into the mouth of Patchogue Bay, Long Island, New York, which then becomes the Great South Bay.  Originally however, the headwaters reached as far north as Medford, New York, near the vicinity of Medford Station.  Swan River is a relatively clean, cold, free flowing, freshwater stream, generally less than 15 feet wide, with a sandy substrate.  This segment of the river flows through much undeveloped forested wetland, but has also been encroached upon by residential development, road construction, and a commercial sand mining operation.  Below Montauk Highway, the river is tidal, and is bordered by undeveloped marshland and limited development of boat docking facilities.  The fish and wildlife habitat encompasses the entire river, including an approximate one and one-half mile tidal segment, and an approximate two and one-half mile freshwater segment, which extends from Swan Lake, above Montauk Highway, to the headwaters of the stream, above Swan Lake, flowing southward into Patchogue Bay.

Swan Lake (1895): The 1917 Petipa/Ivanov/Drigo revival of Swan Lake is a famous version of the ballet "Swan Lake", (ru. " Лебединое Озеро"), (fr.  "Le Lac des Cygnes").  This is a ballet by Pyotr Ilyich Tchaikovsky based on an ancient German legend, presented in either four acts, four scenes (primarily outside Russia and Eastern Europe), three acts, four scenes (primarily in Russia and Eastern Europe) or, more rarely, in two acts, four scenes.  Originally choreographed by Julius Reisinger to the music of Pyotr Ilyich Tchaikovsky (opus 20), it was first presented as "The Lake of the Swans" by the Ballet of the Moscow Imperial Bolshoi Theatre on 20 February/4 March 1877 (Julian/Gregorian calendar dates) in Moscow, Russia.  Although the ballet is presented in many different versions, most ballet companies today base their stagings both choreographically and musically on this revival by Marius Petipa and Lev Ivanov, staged for the Imperial Ballet, first presented on 15 January/27 January 1895, at the Imperial Mariinsky Theatre in St. Petersburg, Russia instead of the original version.

Swan Lake Park: Swan Lake Park is located on East Main Street, East Patchogue, in the township of Brookhaven, Suffolk County, New York.  Swan Lake is nestled between Swan Lake drive on the west side of the lake and Lake drive to the east of the lake.

Romantic ballet: The Romantic ballet is defined primarily by an era in ballet in which the ideas of Romanticism in art and literature influenced the creation of ballets.  The era occurred during the early to mid 19th century primarily at the Théâtre de l'Académie Royale de Musique of the Paris Opera Ballet and Her Majesty's Theatre in London.  It is typically considered to have begun with the 1827 début in Paris of the ballerina Marie Taglioni in the ballet "La Sylphide", and to have reached its zenith with the premiere of the divertissement "Pas de Quatre" staged by the Ballet Master Jules Perrot in London in 1845.  The Romantic ballet had no immediate end, but rather a slow decline.  Arthur Saint-Léon's 1870 ballet "Coppélia" is considered to be the last work of the Romantic Ballet.

Julius Reisinger: Vaclav (Wentsel), or Jules or Julius Wentsel Reisinger (1828 – 1892) is paradoxical figure in the history of ballet.  This prolific choreographer, an author of more than twenty works on various European stages, directed the Moscow company of the Bolshoi Theatre.  He is linked with two memorable events: the first stage production of Tchaikovsky's ballet "Swan Lake" and the production of the first ballet performance for the opening of the Prague National Theatre in 1884.  His work on "Swan Lake" was considered unsuccessful by the critics of the day but not necessarily unsuccessful by the theatre-going public—after all, Reisinger's original production of "Swan Lake" was kept in the active repertoire of the Bolshoi Theatre for seven years and was performed over thirty times during a period when other ballets could not sustain even twenty performances.  In fact, the production was not pulled until the scenery and costumes were worn and threadbare.  Much of its popularity was assumably due to its beautiful musical score which was critically acclaimed even though the choreography was not.

Swan Lake (Montana): Swan Lake is a lake located east of Flathead Lake and the town of Bigfork, Montana.  The Swan River comes from the south and fills the lake.  The lake is similar to Moyie Lake in southern British Columbia.  It is a narrow, small, and twisty lake that is hard to navigate.  There is a small divide that separates the Swan River Valley from the Clearwater River Valley.  The Clearwater River flows south through a series of lakes, including Seeley Lake and empties into the Blackfoot River.  The two valleys are known locally as the Seeley/Swan.  Swan Lake runs parallel to Montana Highway 83.

Supporting paragraphs: Swan Lake (Bourne) Pyotr Ilyich Tchaikovsky
Answer: 1840