Question: What is the wildlife refuge established in 1931 in the United States drained by the East River?

Context paragraphs:
Three Arch Rocks National Wildlife Refuge: Three Arch Rocks National Wildlife Refuge is a U.S. National Wildlife Refuge off the northern Oregon Coast.  It is located on the central coast of Tillamook County, in the northwestern part of Oregon.  It is one of six National Wildlife Refuges within the Oregon Coast National Wildlife Refuge Complex and was the first National Wildlife Refuge west of the Mississippi River.  In 1970 the Refuge was designated as wilderness.  It is one of the smallest wilderness areas in the United States.

St. Marks National Wildlife Refuge: St. Marks National Wildlife Refuge is one of the oldest wildlife refuges in the United States.  Established in 1931 as a wintering ground for migratory birds, it encompasses 68,000 acres (280 km) spread between Wakulla, Jefferson, and Taylor Counties in the state of Florida.

Edwin B. Forsythe National Wildlife Refuge: The Edwin B. Forsythe National Wildlife Refuge is a United States National Wildlife Refuge located in southern New Jersey along the Atlantic coast north of Atlantic City, in Atlantic and Ocean counties.  The refuge was created in 1984 out of two existing refuge parcels created to protect tidal wetland and shallow bay habitat for migratory water birds.  The Barnegat Division (established in 1967) is located in Ocean County on the inland side of Barnegat Bay.  The Brigantine Division (established in 1939) is located approximately 10 miles (16 km) north of Atlantic City along the south bank of the mouth of the Mullica River.  The two divisions are separated by approximately 20 miles (32 km).  The refuge is located along most active flight paths of the Atlantic Flyway, making it an important link in the network of national wildlife refuges administered nationwide by the U.S. Fish and Wildlife Service.  Forsythe Refuge is a part of the Hudson River/New York Bight Ecosystem and The New Jersey Coastal Heritage Trail Route.  The refuge is named for Edwin B. Forsythe, conservationist Congressman from New Jersey.

National Wildlife Refuge: National Wildlife Refuge System is a designation for certain protected areas of the United States managed by the United States Fish and Wildlife Service.  The National Wildlife Refuge System is the system of public lands and waters set aside to conserve America's fish, wildlife and plants.  Since President Theodore Roosevelt designated Florida's Pelican Island National Wildlife Refuge as the first wildlife refuge in 1903, the System has grown to over 562 national wildlife refuges and 38 wetland management districts encompassing more than 150,000,000 acres .

Occoquan Bay National Wildlife Refuge: The Occoquan Bay National Wildlife Refuge is a National Wildlife Refuge located where the Occoquan River meets the Potomac River in Woodbridge, Virginia, United States.  The 644 acre site, about half of which is wetlands, was a popular tourist spot known as Dawson Beach until the 1940s, after which it was used for military research by the U.S. Army's Harry Diamond Laboratories from the 1960s to the 1990s.  When the land was purchased from the military, it was temporarily called the Marumsco National Wildlife Refuge.  The refuge was formally established and renamed in 1998, and is now managed by the United States Fish and Wildlife Service as part of the Potomac River National Wildlife Refuge Complex.

Alaska Peninsula National Wildlife Refuge: The Alaska Peninsula National Wildlife Refuge is a United States National Wildlife Refuge in southwestern Alaska whose use is regulated as an ecological-protection measure.  It stretches along the southern coast of the Alaska Peninsula, between the Becharof National Wildlife Refuge on its east and the end of the peninsula at False Pass in the west.  In between, however, it is broken into sections by lands of the Aniakchak National Monument and Izembek National Wildlife Refuge.  The refuge is administered from offices in King Salmon, Alaska and was established to conserve Alaska Peninsula brown bears, caribou, moose, marine mammals, shorebirds, other migratory birds and fish, and to comply with treaty obligations.

East River (Florida): The East River is a 10 mi river entirely within Wakulla County, Florida, draining part of the St. Marks National Wildlife Refuge into the St. Marks River.

White River National Wildlife Refuge: The White River National Wildlife Refuge (officially Dale Bumpers White River National Wildlife Refuge) is a 160756 acre wildlife refuge located in Desha, Monroe, Phillips, and Arkansas counties in the U.S. state of Arkansas.  The refuge is managed by the United States Fish and Wildlife Service.  White River NWR borders on Cache River National Wildlife Refuge at its northern boundary.

Yukon Flats National Wildlife Refuge: The Yukon Flats National Wildlife Refuge is a protected wetland area in the U.S. state of Alaska.  It encompasses most of the Yukon Flats, a vast wetland area centered on the confluence of the Yukon River, Porcupine River, and Chandalar River.  The area is a major waterfowl breeding ground, and after a proposal to flood the Yukon Flats via a dam on the Yukon River was turned down, the Yukon Flats were deemed worthy of protection.  The Alaska National Interest Lands Conservation Act established the refuge in 1980.  It is the third-largest National Wildlife Refuge in the United States, although it is less than one-half the size of either of the two largest, the Arctic National Wildlife Refuge, or the Yukon Delta National Wildlife Refuge.  The refuge is administered from offices in Fairbanks.

Desert National Wildlife Refuge: The Desert National Wildlife Refuge is a protected wildlife refuge, administered by the U.S. Fish and Wildlife Service, located north of Las Vegas, Nevada, in northwestern Clark and southwestern Lincoln counties, with much of its land area lying within the southeastern section of the Nevada Test and Training Range.  The Desert NWR, created on May 20, 1936, is the largest wildlife refuge in the lower 48 states of the United States, encompassing 1.615 e6acre of the Mojave Desert in the southern part of Nevada.  This Range is part of the larger Desert National Wildlife Refuge Complex, which includes the Ash Meadows National Wildlife Refuge, the Moapa Valley National Wildlife Refuge, and the Pahranagat National Wildlife Refuge.

Supporting paragraphs: East River (Florida) St. Marks National Wildlife Refuge
Answer: St. Marks National Wildlife Refuge