Question: Which of the town which constituted part of the Megunticook Lake was in Waldo County, Maine, United States?
Context: Belfast is a city in Waldo County, Maine, in the United States.  As of the 2010 census, the city population was 6,668.  Located at the mouth of the Passagassawakeag River estuary on Penobscot Bay, Belfast is the county seat of Waldo County.  The seaport has a wealth of antique architecture in several historic districts, and remains popular with tourists. Lake St. George State Park is a public recreation area located on the northwest shore of Lake St. George in the town of Liberty, Waldo County, Maine.  The state park covers 358 acre and offers camping, lifeguard-supervised swimming, picnicking, canoeing, motorized boating, and fishing.  The lake's 1017 acre support populations of landlocked salmon and brook trout.  The park is managed by the Maine Department of Agriculture, Conservation and Forestry. Swan Lake is the second largest lake in Waldo County, Maine.  Originally known as Goose Pond, during the 19th century it came increasingly to be referred to as Swan Lake, after the town of Swanville, Maine, which before incorporation had been known as the Plantation of Swan. Swan Lake State Park is a public recreation area at the north end of 3 mi Swan Lake in the town of Swanville, Waldo County, Maine.  The state park's 67 acre offer opportunities for swimming, picnicking, canoeing, and fishing.  The 1370 acre lake supports populations of smallmouth bass, landlocked salmon, white perch, brook trout, and wild togue.  The park is managed by the Maine Department of Agriculture, Conservation and Forestry. USS "Waldo County" (LST-1163), previously USS "LST-1163", was a United States Navy landing ship tank (LST) in commission from 1953 to 1970, and which then saw non-commissioned Military Sealift Command service as USNS "Waldo County" (T-LST-1163) from 1972 to 1973. Waldo County is a county located in the state of Maine, in the United States.  As of the 2010 census, the population was 38,786.  Its county seat is Belfast.  The county was founded on 7 February 1827 from a portion of Hancock County and named after Brigadier-General Samuel Waldo, proprietor of the Waldo Patent. Waldo is a town in Waldo County, Maine, United States.  The population was 762 at the 2010 census.  Home town of Heather Hemmens, who is known for her role on Hellcats. 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. Megunticook Lake is a body of water in Knox County, Maine.  Parts of the lake are located in the towns of Camden, Hope and Lincolnville.  Covering 1,328 acres, it is the largest lake by both area and volume in Knox County.  Megunticook Lake is very picturesque with the towering cliffs of Mount Megunticook rising from the east shore.  The public can access the lake from improved boat ramps located off route 52 to the east and route 105 along the west shore.  The lake also serves as a public water supply for near by towns. Unity is a town in Waldo County, Maine, United States.  The population was 2,099 at the 2010 census.  The town is the service center for the northern portion of Waldo County.  Outside of Waldo county, it is best known as the home of the Maine Organic Farmers and Gardeners Association, its Common Ground Country Fair and Unity College.  Unity College was founded in 1965 to offset the economic effects of the declining chicken farming industry.  As of 2007, the college is the town's largest employer.
Answer: Lincolnville