paragraph_text: Everglades National Park is a U.S. National Park in Florida that protects the southern 20 percent of the original Everglades. In the United States, it is the largest tropical wilderness, the largest wilderness of any kind east of the Mississippi River, and is visited on average by one million people each year. It is the third - largest national park in the lower 48 states after Death Valley and Yellowstone. It has been declared an International Biosphere Reserve, a World Heritage Site, and a Wetland of International Importance, one of only three locations in the world to appear on all three lists.

paragraph_text: Tito's visits to the United States avoided most of the Northeast due to large minorities of Yugoslav emigrants bitter about communism in Yugoslavia. Security for the state visits was usually high to keep him away from protesters, who would frequently burn the Yugoslav flag. During a visit to the United Nations in the late 1970s emigrants shouted "Tito murderer" outside his New York hotel, for which he protested to United States authorities.

paragraph_text: The Forty Years' War (; 1385 – 1424; also Ava-Pegu War or the Mon-Burmese War) was a military conflict fought between the Burmese-speaking Kingdom of Ava and the Mon-speaking Kingdom of Hanthawaddy Pegu. The war was fought during two separate periods: 1385 to 1391, and 1401 to 1424, interrupted by two truces of 1391–1401 and 1403–1408. It was fought primarily in today's Lower Burma and also in Upper Burma, Shan State and Rakhine State. It ended in a stalemate, preserving the independence of Hanthawaddy, and effectively ending Ava's efforts to rebuild the erstwhile Pagan Kingdom.

paragraph_text: Belle Isle Park, more commonly known simply as Belle Isle (/ bɛlˈaɪəl /), is a 982 - acre (1.534 sq mi; 397 ha) island park in the Detroit River between Michigan and Ontario. The U.S. - Canada border is in the channel south of Belle Isle such that the island is not in Canada. Owned by the city of Detroit, Belle Isle is managed as a state park by the Michigan Department of Natural Resources through a 30 - year lease initiated in 2013; it was previously a city park. Belle Isle is the largest city - owned island park in the United States and is the third largest island in the Detroit River after Grosse Ile and Fighting Island. It is connected to mainland Detroit by the MacArthur Bridge.

paragraph_text: In 2010 after sanctions were imposed on Iraq, she arrived in Baghdad with a delegation of 69 officials. Shortly before the invasion of Iraq in 2003, she met with Saddam Hussein. In 2011, she strongly denounced the policies of U.S. Secretary of State Hillary Clinton and U.S. President Barack Obama, calling for a mediation of the Libyan Civil War through an international organization which would exclude them.Ayesha has served as a mediator on behalf of the government with European Union corporations.

paragraph_text: Operation Praying Mantis was an attack on 18 April 1988, by U.S. forces within Iranian territorial waters in retaliation for the Iranian mining of the Persian Gulf during the Iran–Iraq War and the subsequent damage to an American warship.

paragraph_text: The Hudson River is a 315 - mile (507 km) river that flows from north to south primarily through eastern New York in the United States. The river originates in the Adirondack Mountains of Upstate New York, flows through the Hudson Valley, and eventually drains into the Atlantic Ocean, between New York City and Jersey City. The river serves as a political boundary between the states of New Jersey and New York, and further north between New York counties. The lower half of the river is a tidal estuary occupying the Hudson Fjord, an inlet which formed during the most recent period of North American glaciation, estimated at 26,000 to 13,300 years ago. Tidal waters influence the Hudson's flow from as far north as Troy.

paragraph_text: New York covers 54,555 square miles (141,300 km) and ranks as the 27th largest state by size. The highest elevation in New York is Mount Marcy in the Adirondacks, at 5,344 feet (1,629 meters) above sea level; while the state's lowest point is at sea level, on the Atlantic Ocean.

paragraph_text: Tillandsia violacea is an epiphytic species in the genus "Tillandsia". This species is endemic to Mexico, particularly to the Central Mexican Plateau. This species' habitat is at elevations between 600-3,100 meters, and is epiphytic to large trees in humid temperate forests, primarily the species abies religiosa, quercus rugosa, and quercus laurina. In particular, it is a common epiphyte of the temperate pine forests of Hidalgo state, including El Chico National Park. Its range extends to the states of Guerrero, Jalisco, state of Mexico, Michoacán, Morelos, Oaxaca, and Veracruz. Due to its high-elevation habitat, this bromeliad species has tolerance to sub-freezing conditions.

paragraph_text: Twenty - seven states have national parks, as do the territories of American Samoa and the United States Virgin Islands. California has the most (nine), followed by Alaska (eight), Utah (five), and Colorado (four). The largest national park is Wrangell -- St. Elias in Alaska: at over 8 million acres (32,375 km), it is larger than each of the nine smallest states. The next three largest parks are also in Alaska. The smallest park is Hot Springs, Arkansas, at less than 6 thousand acres (24 km). The total area protected by national parks is approximately 52.2 million acres (211,000 km), for an average of 885 thousand acres (3,580 km) but a median of only 236 thousand acres (960 km) at Mount Rainier, the 30th largest park. The most - visited national park is Great Smoky Mountains in North Carolina and Tennessee, with over 11.3 million visitors in 2016, followed by Arizona's Grand Canyon, with nearly 6 million. In contrast, only 10,047 people visited the remote Gates of the Arctic in Alaska in the same year.

paragraph_text: Shinga is a town in Gombe State of Nigeria. It lies at an elevation of 425 meters between the Bima Hills and the left (east) bank of the Gongola River.

paragraph_text: Morattico is an unincorporated former post office town along the Rappahannock River in Lancaster County, Virginia, United States. It sits across Morattico Creek from Belle Isle State Park. "Morattico" is an anglicized version of "Moraughticund", the name of a Native American tribe whose primary village may have been on or near this site. In 1608, Captain John Smith mediated a feud between the Moraughticunds and their neighbors, the Rappahannock tribe.

paragraph_text: Mesopotamia is a historical region in West Asia situated within the Tigris -- Euphrates river system, in modern days roughly corresponding to most of Iraq plus Kuwait, the eastern parts of Syria, Southeastern Turkey, and regions along the Turkish -- Syrian and Iran -- Iraq borders.

paragraph_text: Michael Scott Speicher (12 July 1957 – January 17, 1991) was a United States Navy pilot who was shot down over Iraq during the Persian Gulf War becoming the first American combat casualty of the war. His fate was not known until 2 August 2009 when the Navy reported that Speicher's remains were found in Iraq by United States Marines.

paragraph_text: There are seven state parks within the confines of New York City, including Clay Pit Ponds State Park Preserve, a natural area which includes extensive riding trails, and Riverbank State Park, a 28-acre (110,000 m2) facility that rises 69 feet (21 m) over the Hudson River.

paragraph_text: Ekhrajiha (, The Outcast) is a 2007 Iranian film, written and directed by Masoud Dehnamaki, narrating a story during Iran–Iraq War.

paragraph_text: On September 22, 1980, the Iraqi army invaded the Iranian Khuzestan, and the Iran–Iraq War began. Although the forces of Saddam Hussein made several early advances, by mid 1982, the Iranian forces successfully managed to drive the Iraqi army back into Iraq. In July 1982, with Iraq thrown on the defensive, Iran took the decision to invade Iraq and conducted countless offensives in a bid to conquer Iraqi territory and capture cities, such as Basra. The war continued until 1988, when the Iraqi army defeated the Iranian forces inside Iraq and pushed the remaining Iranian troops back across the border. Subsequently, Khomeini accepted a truce mediated by the UN. The total Iranian casualties in the war were estimated to be 123,220–160,000 KIA, 60,711 MIA, and 11,000–16,000 civilians killed.

paragraph_text: Raleigh is an early example in the United States of a planned city, chosen as the site of the state capital in 1788 and incorporated in 1792 as such. The city was originally laid out in a grid pattern with the North Carolina State Capitol in Union Square at the center. In the United States Civil War the city was spared from any significant battle, only falling in the closing days of the war, though it did not escape the economic hardships that plagued the rest of the American South during the Reconstruction Era. The twentieth century saw the opening of the Research Triangle Park in 1959, and with the jobs it created the region and city saw a large influx of population, making it one of the fastest growing communities in the United States by the early 21st century.

paragraph_text: Zekiah Swamp is part of the Potomac River basin in Charles County, Maryland in the United States. The swamp is of braided stream stretching the length of Charles County and is a tributary of the Potomac River. It sits at an elevation of and of its southern end is protected as the Zekiah Swamp Natural Environment Area. The Maryland Department of Natural Resources has the authority to purchase an additional for the park. Charles County has moved to protect an additional of the wetland. The headwaters of the swamp are protected as part of Cedarville State Forest. It was first accurately surveyed by John Henry Alexander, Maryland's official cartographer, in 1835, as "Allen's Fresh".

paragraph_text: United States support for Ba'athist Iraq during the Iran -- Iraq War, against post-revolutionary Iran, included several billion dollars' worth of economic aid, the sale of dual - use technology, non-U.S. origin weaponry, military intelligence, and special operations training. At no point, however, did the U.S. directly supply arms to Iraq. Of particular interest for contemporary Iran -- United States relations are the repeated accusations that the U.S. government actively encouraged Iraqi leader Saddam Hussein to invade Iran (proponents of this theory frequently describe the U.S. as having given Saddam a ``green light ''), supported by a considerable amount of circumstantial evidence, but the U.S. government officially denies that any such collusion occurred, and no conclusive proof of it has been found by scholars that have studied the issue.

Question: How many meters above the largest river in the state Tito saw when he visited the organization that mediated the truce ending the Iran-Iraq War is Riverbank State Park?
Answer: 21