Question: When was the county that  Manana Island is in founded?

full_context: Document 1: Monhegan, Maine: Monhegan is a plantation in Lincoln County, Maine, United States, about 12 nmi off the mainland. The population was 69 at the 2010 census. The plantation comprises its namesake island and the uninhabited neighboring island of Manana. The island is accessible by scheduled boat service from Boothbay Harbor, New Harbor and Port Clyde. It was designated a National Natural Landmark for its coastal and island flora in 1966.
Document 2: Hancock County, Maine: Hancock County is a county located in the U.S. state of Maine. As of the 2010 census, the population was 54,418. Its county seat is Ellsworth. The county was incorporated on June 25, 1789 and named for John Hancock, the first governor of the Commonwealth of Massachusetts. The Commissioners are Antonio Blasi, Steven Joy, Percy Brown.
Document 3: Lincoln County, Maine: Lincoln County is a county located in the U.S. state of Maine. As of the 2010 census, the population was 34,457. Its county seat is Wiscasset. The county was founded in 1760 from a portion of York County, Massachusetts and named after the English city Lincoln, the birthplace of Massachusetts Bay Provincial Governor Thomas Pownall.
Document 4: Matinicus Isle, Maine: Matinicus Isle is an island plantation in Knox County, Maine, United States. The island is located within Penobscot Bay about 20 miles east of the mainland coast and is accessible by ferry from Rockland or by air taxi from Knox County Regional Airport. The plantation is both a year-round island community and a summer colony. The population was 74 at the 2010 census.
Document 5: Wiscasset, Maine: Wiscasset is a town in and the county seat of Lincoln County, Maine, in the United States. The municipality is located in the Mid Coast region of the state. The population was 3,732 as of the 2010 census. Home to the Chewonki Foundation, Wiscasset is a tourist destination noted for early architecture.
Document 6: Damariscotta, Maine: Damariscotta ( ) is a town in Lincoln County, Maine, United States. The population was 2,218 at the 2010 census. A popular tourist resort area, the towns of Damariscotta and Newcastle are linked by the Main Street bridge over the Damariscotta River, forming the "Twin Villages". The name Damariscotta is an Indian name meaning "river of little fish".
Document 7: Warren Island State Park: Warren Island State Park is state-owned island and public recreation area on Penobscot Bay in the town of Islesboro, Waldo County, Maine. The 70 acre state park sits about ½-mile from Islesboro Island and 3 mi offshore from the mainland at Lincolnville. The island was acquired by the state of Maine for one dollar in 1959. Hiking trails, campsites, and open-faced shelters are found on the island; a pier allows access by private boat.
Document 8: Islesboro, Maine: Islesboro is a town in Waldo County, Maine, United States. The population was 566 at the 2010 census. It has a summer colony accessible by ferry from Lincolnville Beach 3 miles to the west, or by air taxi service. Home to Warren Island State Park, Islesboro includes the villages of Dark Harbor, Pripet and North Islesboro otherwise known as Guinea.
Document 9: Lincolnville, Maine: Lincolnville is a town in Waldo County, Maine, United States. The population was 2,164 at the 2010 census. Lincolnville is the mainland terminal for state ferry service to Islesboro.
Document 10: Manana Island (Maine): Manana Island is an island in Lincoln County, Maine, United States, lying adjacent to Monhegan island, about 10 mi off Pemaquid Point on the mainland. The island is part of the Plantation of Monhegan.
Document 11: Cumberland County, Maine: Cumberland County is a county located in the state of Maine, in the United States. As of the 2010 census, the population was 281,674, making it the most populous county in Maine. Its county seat is Portland. Cumberland County was founded in 1760 from a portion of York County, Massachusetts and named for William, Duke of Cumberland, a son of King George II.
Document 12: Chebeague Island, Maine: Chebeague Island is an island town in Cumberland County, Maine, United States, located in Casco Bay, 10 mi from Portland. These islands are sometimes referred to as an older, now archaic term "The Calendar Islands" because there was once a belief that the approximate number of islands was 365. The actual number is fewer than two hundred. Great Chebeague was a part of the town of Cumberland until July 1, 2007, when it became the town of Chebeague Island. As of the 2010 census, the town had a population of 341.
Document 13: Alna, Maine: Alna is a town in Lincoln County, Maine, United States. The population was 709 at the 2010 census. Home to the Wiscasset, Waterville & Farmington Railway Museum, Alna includes the early mill village of Head Tide, noted for its historic architecture.
Document 14: Lincoln, New Hampshire: Lincoln is a town in Grafton County, New Hampshire, United States. It is the second-largest town by area in New Hampshire. The population was 1,662 at the 2010 census. The town is home to the New Hampshire Highland Games and to a portion of Franconia Notch State Park. Set in the White Mountains, large portions of the town are within the White Mountain National Forest. The Appalachian Trail crosses in the northeast. Lincoln is the location of the Loon Mountain ski resort and associated recreation-centered development.
Document 15: Mount Desert Island: Mount Desert Island (often abbreviated MDI), in Hancock County, Maine, is the largest island off the coast of Maine. With an area of 108 sqmi it is the 6th largest island in the contiguous United States. It is the second-largest island on the Eastern seaboard, behind Long Island and ahead of Martha's Vineyard. According to the 2010 census, the island has a year-round population of 10,615, although it is estimated that two and a half million tourists a year visit Acadia National Park on the island. The island is home to numerous well-known summer colonies such as Northeast Harbor and Bar Harbor.
ground_truth: 1760