Question: How many congressional districts are in the state Elk River is located?

full_context: Document 1: Elk River (Kansas): The Elk River is a tributary of the Verdigris River in southeastern Kansas in the United States. Via the Verdigris and Arkansas rivers, it is part of the Mississippi River watershed.
Document 2: New Jersey's congressional districts: There were 12 United States congressional districts in New Jersey based on results from the 2010 Census. There were once as many as 15. The fifteenth district was lost after the 1980 Census, the fourteenth district was lost after the 1990 Census, and the thirteenth district was lost after the 2010 Census.
Document 3: Mississippi River: The Mississippi River is the chief river of the second - largest drainage system on the North American continent, second only to the Hudson Bay drainage system. Flowing entirely in the United States (although its drainage basin reaches into Canada), it rises in northern Minnesota and meanders slowly southwards for 2,320 miles (3,730 km) to the Mississippi River Delta at the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains all or parts of 31 U.S. states and 2 Canadian provinces between the Rocky and Appalachian Mountains. The Mississippi ranks as the fourth - longest and fifteenth - largest river in the world by discharge. The river either borders or passes through the states of Minnesota, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, and Louisiana.
Document 4: Knife River: The Knife River is a tributary of the Missouri River, approximately 120 mi (193 km) long, in North Dakota in the United States.
Document 5: Elk Falls, Kansas: Elk Falls is a city in Elk County, Kansas, United States, along the Elk River. As of the 2010 census, the city population was 107.
Document 6: Kansas's 4th congressional district: Kansas's 4th Congressional District is a Congressional District in the U.S. state of Kansas. Based in the south central part of the state, the district encompasses the city of Wichita and surrounding areas.
Document 7: Kansas House of Representatives: The Kansas House of Representatives is the lower house of the legislature of the U.S. state of Kansas. Composed of 125 state representatives from districts with roughly equal populations of at least 19,000, its members are responsible for crafting and voting on legislation, helping to create a state budget, and legislative oversight over state agencies.
Document 8: United States House of Representatives: The composition and powers of the House are established by Article One of the United States Constitution. The House is composed of Representatives who sit in congressional districts that are allocated to each of the 50 states on a basis of population as measured by the U.S. Census, with each district entitled to one representative. Since its inception in 1789, all Representatives have been directly elected. The total number of voting representatives is fixed by law at 435. As of the 2010 Census, the largest delegation is that of California, with fifty - three representatives. Seven states have the smallest delegation possible, a single representative: Alaska, Delaware, Montana, North Dakota, South Dakota, Vermont, and Wyoming.
Document 9: Mississippi River: The Mississippi River is the chief river of the second - largest drainage system on the North American continent, second only to the Hudson Bay drainage system. The stream is entirely within the United States (although its drainage basin reaches into Canada), its source is Lake Itasca in northern Minnesota and it flows generally south for 2,320 miles (3,730 km) to the Mississippi River Delta in the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains all or parts of 31 U.S. states and two Canadian provinces between the Rocky and Appalachian Mountains. The Mississippi ranks as the fourth - longest and fifteenth - largest river in the world by discharge. The river either borders or passes through the states of Minnesota, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, and Louisiana.
Document 10: Elk River (Oklahoma): The Elk River is a tributary of the Neosho River in southwestern Missouri and northeastern Oklahoma in the United States. Its tributaries also drain a small portion of northwestern Arkansas. Via the Neosho and Arkansas rivers, the Elk is part of the Mississippi River watershed.
Document 11: Strawberry River (Arkansas): The Strawberry River is a tributary of the Black River, about long, in northern Arkansas in the United States. Via the Black and White rivers, it is part of the watershed of the Mississippi River.
Document 12: Oklahoma: Following the 2000 census, the Oklahoma delegation to the U.S. House of Representatives was reduced from six to five representatives, each serving one congressional district. For the 112th Congress (2011–2013), there were no changes in party strength, and the delegation included four Republicans and one Democrat. In the 112th Congress, Oklahoma's U.S. senators were Republicans Jim Inhofe and Tom Coburn, and its U.S. Representatives were John Sullivan (R-OK-1), Dan Boren (D-OK-2), Frank D. Lucas (R-OK-3), Tom Cole (R-OK-4), and James Lankford (R-OK-5).
Document 13: Kansas's congressional districts: Kansas is currently divided into 4 congressional districts, each represented by a member of the United States House of Representatives. The number of districts in Kansas remained unchanged after the 2010 Census.
Document 14: United States Congress: The members of the House of Representatives serve two - year terms representing the people of a single constituency, known as a ``district ''. Congressional districts are apportioned to states by population using the United States Census results, provided that each state has at least one congressional representative. Each state, regardless of population or size, has two senators. Currently, there are 100 senators representing the 50 states. Each senator is elected at - large in their state for a six - year term, with terms staggered, so every two years approximately one - third of the Senate is up for election.
Document 15: English River (Iowa): The English River is a tributary of the Iowa River in southeastern Iowa in the United States. The main stem of the river is long. Including its longest headwaters tributary, the North English River, the total length increases to . Via the Iowa River, it is part of the Mississippi River watershed. The Deep River is a minor tributary of the English River. The towns of North English, South English and Deep River are named for the English and Deep rivers.
ground_truth: 4
sub_queries: Elk River >> located in the administrative territorial entity Answer: Kansas
how many congressional districts are there in Kansas Answer: 4