Question: In what park will you find a diamond mine in the U.S. state that produces the most rice?

full_context: Document 1: Cotton production in the United States: Texas produces more cotton than any other state in the United States. With eight production regions around Texas, and only four geographic regions, it is the state's leading cash crop. Texas produces approximately 25% of the country's cotton crop on more than 6 million acres, the equivalent of over 9,000 square miles (23,000 km) of cotton fields. Texas Cotton Producers includes nine certified cotton grower organizations; it addresses national and statewide cotton grower issues, such as the national farm bill and environmental legislation.
Document 2: Rush Creek mining district: The best known and most prolific zinc mining region of north Arkansas for many years was the Rush Creek mining district of Marion County. Its history began when John Wolfer—an early prospector along the Buffalo River—discovered a large deposit of zinc on the creek in southern Marion County. George Chase purchased Wolfer's claim and established the Morning Star Mining Company, which eventually became one of the largest producers of zinc in Arkansas. One day a miner at the Morning Star Mine extracted a single mass of pure smithsonite (zinc carbonate) weighing 12,750 pounds.
Document 3: Rice production in the United States: Rice production is important to the economy of the United States. Of the country's row crop farms, rice farms are the most capital - intensive, and have the highest national land rental rate average. In the US, all rice acreage requires irrigation. In 2000 - 09 approximately 3.1 million acres in the US were under rice production, while an increase is expected in the next decade to approximately 3.3 million acres. US Rice represents rice producers in the six largest rice - producing states of Arkansas (The nations's number one rice producer.), California, Louisiana, Mississippi, Missouri, and Texas.
Document 4: Crow Flies High State Recreation Area: Crow Flies High State Recreation Area is a day-use state park in Mountrail County, North Dakota, west of the community of New Town. The site provides scenic views of Lake Sakakawea. Signs describe the location's role in local history, including its significance in the explorations of Lewis and Clark. The footprint of the drowned town of Sanish, now lost below the reservoir's waves, can be seen at times of low water.
Document 5: Rajasthan: Rajasthan's economy is primarily agricultural and pastoral. Wheat and barley are cultivated over large areas, as are pulses, sugarcane, and oilseeds. Cotton and tobacco are the state's cash crops. Rajasthan is among the largest producers of edible oils in India and the second largest producer of oilseeds. Rajasthan is also the biggest wool-producing state in India and the main opium producer and consumer. There are mainly two crop seasons. The water for irrigation comes from wells and tanks. The Indira Gandhi Canal irrigates northwestern Rajasthan.
Document 6: Myanmar: The major agricultural product is rice, which covers about 60% of the country's total cultivated land area. Rice accounts for 97% of total food grain production by weight. Through collaboration with the International Rice Research Institute 52 modern rice varieties were released in the country between 1966 and 1997, helping increase national rice production to 14 million tons in 1987 and to 19 million tons in 1996. By 1988, modern varieties were planted on half of the country's ricelands, including 98 percent of the irrigated areas. In 2008 rice production was estimated at 50 million tons.
Document 7: Grand Canyon National Park: Grand Canyon National Park, located in northwestern Arizona, is the 15th site in the United States to have been named a national park. The park's central feature is the Grand Canyon, a gorge of the Colorado River, which is often considered one of the Wonders of the World. The park, which covers 1,217,262 acres (1,901.972 sq mi; 4,926.08 km) of unincorporated area in Coconino and Mohave counties, received more than six million recreational visitors in 2017, which is the second highest count of all American national parks after Great Smoky Mountains National Park. The Grand Canyon was designated a World Heritage Site by UNESCO in 1979.
Document 8: Mammoth Spring State Park: Mammoth Spring State Park is a Arkansas state park in Fulton County, Arkansas in the United States. The park is located surrounding National Natural Landmark of the same name to provide recreation and interpretation for visitors. The park offers fishing, boating and hiking in addition to an Arkansas Welcome Center and restored 1886 St. Louis–San Francisco Railway (Frisco) depot operating as a railroad museum. The site became a state park in 1957, but the park continued to add area until 1975.
Document 9: Tar Creek Superfund site: Tar Creek Superfund site is a United States Superfund site, declared 1983, located in the cities of Picher and Cardin, Ottawa County, in northeastern Oklahoma. From 1900 to the 1960s lead mining and zinc mining companies left open chat piles behind until the present day. The dust has blown around the city containing these metals, cadmium, and others. The metals have also seeped into groundwater, ponds, and lakes, many of which still are used by children for swimming. Elevated lead, zinc and manganese levels in Picher children have led to learning disabilities and other problems. The EPA declared Picher to be one of the most toxic areas in the United States.
Document 10: Corn production in the United States: Iowa, the largest producer of corn in the US, grows three times as much corn as Mexico. Iowa harvested 3,548 acres (1,436 ha) of sweet corn in 2007. In 2011, the state had 92,300 corn farms on 30,700,000 acres (12,400,000 ha), the average size being 333 acres (135 ha), and the average dollar value per acre being US $6,708. In the same year, there were 13.7 million harvested acres of corn for grain, producing 2.36 billion bushels, which yielded 172.0 bu / acre, with US $14.5 billion of corn value of production. Almost 1.88 billion bushels of corn were grown in the state in 2012 on 13.7 million acres of land, while the 2013 projections are 2.45 billion bushels of corn on 13.97 million acres of land.
Document 11: Slide Rock State Park: Slide Rock State Park is a state park of Arizona, USA, taking its name from a natural water slide formed by the slippery bed of Oak Creek. The park is located in Oak Creek Canyon 7 miles (11 km) north of Sedona. Slide Rock State Park is located on Coconino National Forest land and is co-managed by the Arizona State Parks agency and the U.S. Forest Service. Tall red rock formations that are typical of the region also surround the park, which contains a 43 - acre (17 ha) working apple farm.
Document 12: Crater of Diamonds State Park: Crater of Diamonds State Park is a 911 - acre (369 ha) Arkansas state park in Pike County, Arkansas, in the United States. The park features a 37.5 - acre (15.2 ha) plowed field, the world's only diamond - bearing site accessible to the public. Diamonds have continuously been discovered in the field since 1906, including the Strawn - Wagner Diamond. The site became a state park in 1972 after the Arkansas Department of Parks and Tourism purchased the site from the Arkansas Diamond Company and Ozark Diamond Mines Corporation, who had operated the site as a tourist attraction previously.
Document 13: Petroleum refining in the United States: Most large refineries are near navigable waterways, especially seaports or Great Lakes ports. The single largest concentration of refineries is along the Gulf Coast. Although there are refineries in 30 states, just three states dominate US refining: Texas (47 operating refineries), Louisiana (19), and California (18). As of January 2015, these three states contain 45% of all US refineries and 59% of all US refining capacity.
Document 14: Rice Belt: The Rice Belt of the United States includes Arkansas, Louisiana, Mississippi and Texas, four southern U.S. states that grow a significant portion of the nation's rice crop. The name is in conformity with the Corn Belt of the Midwest, in which much of the nation's corn is grown.
Document 15: Wheat production in the United States: The United States Department of Agriculture defines eight official classes of wheat: durum wheat, hard red spring wheat, hard red winter wheat, soft red winter wheat, hard white wheat, soft white wheat, unclassed wheat, and mixed wheat. Winter wheat accounts for 70 to 80 percent of total production in the U.S., with the largest amounts produced in Kansas (10.8 million tons) and North Dakota (9.8 million tons). The U.S. hard red spring wheat crop is exported to over 70 countries each year to the extent of 55%. Of the total wheat produced in the country, 50% is exported, valued at US $9 billion.
ground_truth: Crater of Diamonds State Park
sub_queries: what state produces the most rice in the us Answer: Arkansas
where is the diamond mine in Arkansas located Answer: Crater of Diamonds State Park