Question: In what year did the park where the Sleepy Hollow Stakes is held in the fall first open?

Context paragraphs:
Sleepy Hollow Stakes: The Sleepy Hollow is an American ungraded restricted stakes race for two-year-olds Thoroughbreds held in the fall at Belmont Park, New York.  Though not restricted to New York bred horses, this is not an open race: it is considered a race on the New York bred schedule.

1977 Open Championship: The 1977 Open Championship was the 106th Open Championship, held 6–9 July on the Ailsa Course at Turnberry, Scotland.  Tom Watson won the second of his five Open titles by one stroke over runner-up Jack Nicklaus.  The two played together in the final two rounds and had separated themselves from the field under clear skies, leading this Open to be remembered as the "Duel in the Sun."  This was the first Open ever held at Turnberry, which renamed its 18th hole after the duel.  Three months earlier, Watson had held off Nicklaus to win his first green jacket at the Masters.

Devon Ditty: Devon Ditty (8 May 1976 – 1999) was a British Thoroughbred racehorse and broodmare.  In a racing career which lasted from April 1978 until August 1980, she won eleven of her twenty-four races, finished second three times and third on four occasions.  As a two-year-old she won two minor races from her first four starts but then emerged as arguably the best British filly with five consecutive wins in the Cherry Hinton Stakes, Princess Margaret Stakes, Lowther Stakes, Flying Childers Stakes and Cheveley Park Stakes.  At three she was mainly campaigned over sprint races: she won the Gus Demmy Stakes at Haydock Park and was placed in the Nell Gwyn Stakes, King George Stakes, Goldene Peitsche and Haydock Sprint Cup.  In the following year she raced in California where she won three times from seven races.  She later had some success as a broodmare, producing several minor winners.

Belmont Park: Belmont Park is a major Thoroughbred horse-racing facility located in Elmont, New York, just outside New York City limits.  It first opened on May 4, 1905.  It is typically open for racing from late April through mid-July (known as the Spring meet), and again from mid-September through late October (the Fall meet).

Rockefeller State Park Preserve: Rockefeller State Park Preserve is a state park in Sleepy Hollow, New York in the eastern foothills of the Hudson River in Westchester County.  Common activities in the park include walking, jogging, running, horse-riding, birdwatching, and fishing.  The park has a rich history and was donated to the State of New York over time by the Rockefeller Family beginning in 1983.

The Legend of Sleepy Hollow: "The Legend of Sleepy Hollow" is a short story of speculative fiction by American author Washington Irving, contained in his collection of 34 essays and short stories entitled, "The Sketch Book of Geoffrey Crayon, Gent. ".  Written while Irving was living abroad in Birmingham, England, "The Legend of Sleepy Hollow" was first published in 1820.  Along with Irving's companion piece "Rip Van Winkle", "The Legend of Sleepy Hollow" is among the earliest examples of American fiction with enduring popularity, especially during Halloween because of a character known as the headless horseman believed to be a Hessian soldier who lost his head to a cannonball in battle.

Dundee Township Park District: The Dundee Township Park District provides park areas, open spaces, recreational facilities and services.  The Park District serves the communities of Carpentersville, East Dundee, West Dundee, Sleepy Hollow, and portions of Elgin, Barrington Hills, Hoffman Estates, Gilberts and Algonquin.  The park district is in Kane County, Illinois.

Sleepy Hollow State Park: Sleepy Hollow State Park is a 2678 acre state park located off US-127 in Ovid Township and Victor Township, near St. Johns and Laingsburg, Michigan.  Located at 7835 East Price Road, the park contains many miles of hiking, biking, and horse trails as well as a medium-sized man-made lake known as Lake Ovid.  A dam located in the northwest corner of the lake flooded the area which created the relatively shallow body of water.  Lake Ovid, covering 410 acre , was developed by damming the Little Maple River.  Several islands of varying size provide sanctuary for a variety of marine bird species including Canada geese, swans, and blue herons.

Abraham de Revier, Sr.: Abraham de Revier, Sr. was the first elder of the Old Dutch Church of Sleepy Hollow in Sleepy Hollow, New York when it was organized in 1697.

1968 British Hard Court Championships: The 1968 British Hard Court Championships was a combined men's and women's tennis tournament played on outdoor clay courts at The West Hants Club in Bournemouth in England.  It was the first tournament in the Open Era of tennis.  The tournament was held from 22 April to 27 April 1968.  Ken Rosewall and Virginia Wade won the first open singles titles while the men's team of Roy Emerson and Rod Laver and the women's team of Christine Truman Janes and Nell Truman won the first open doubles titles.

Supporting paragraphs: Sleepy Hollow Stakes Belmont Park
Answer: 1905