Question: Which summer resort colony is part of Southport, Maine?

Context paragraphs:
Squirrel Island, Maine: Squirrel Island, Maine is a summer resort colony off the coast of Boothbay Harbor.  The origin of the name is not related to its squirrel population, since according to island chronicler Charles McLane "[s]quirrels do not inhabit the island (or if they do now, they did not in early times according to local pundits)," but, rather, refers to the shape of the island which, when seen from above, resembles a squirrel holding an acorn.

Chautauqua, Illinois: Chautauqua (also known as the New Piasa Chautauqua Historic District) is a private semi-gated summer resort that started as a 19th-century tent settlement.  The name Piasa is taken from a nearby Native American painting of a mythical bird, called the Piasa Bird, which was painted on the bluffs high above the Mississippi River.  Chautauqua is located between Elsah and Grafton in Jersey County.  Today, it is bordered by and has access from the Great River Road.  It has functioned as a private non-denominational Christian summer resort for over a century.

Olimp, Romania: Olimp is a summer resort on the Romanian seacoast, on the Black Sea, 7 km north of Mangalia. The Comorova forest is near the summer resort.

Southport, Maine: Southport is a town in Lincoln County, Maine, United States.  The population was 606 at the 2010 census.  It includes the villages of Southport, West Southport, Cape Newagen, and Squirrel Island.  The majority of the town's residents live on its main island, Southport Island.

The Breakwater: The Breakwater is a historic sporting lodge on the Mount Kineo peninsula of Moosehead Lake in central Maine.  Built in 1909, it is an architecturally sophisticated example of a sporting lodge, exhibiting Shingle style and Italianate features.  It was designed by Howard G. Chamberlain, a New York City architect, with funding from the nearby Mount Kineo Resort and the Moosehead Yacht Club.  It was one of the centerpieces of central Maine's most successful summer resort, and was listed on the National Register of Historic Places in 2002.

Poland Springs Historic District: The Poland Springs Historic District encompasses the area that was once Maine's premier inland summer resort, renowned for the supposed curative powers of its spring waters.  Located on the north side of Maine Street (Maine State Route 26) in South Poland, Maine, it includes surviving resort buildings in a landscaped environment that includes a golf course, as well as the earliest bottling facilities of water distributor Poland Spring.  The district was listed on the National Register of Historic Places in 1984.  Most of the district is now occupied by the Poland Springs Resort complex.

Conneaut Lake Park: Conneaut Lake Park is a summer resort and amusement park, located in Conneaut Lake, Pennsylvania, United States.  It has long served as a regional tourist destination, and is noted by roller coaster enthusiasts for its classic Blue Streak coaster, which was recently classified as "historic" by the American Coaster Enthusiasts group.  Conneaut Lake is Pennsylvania's largest natural (glacier) lake and is a popular summer resort for recreational boaters due to there being no horsepower limit on the lake.

Yam Ski Resort: Yam Ski Resort, also calls Payam Ski Resort, is a ski resort in Marand in North of Tabriz, East Azerbaijan, Iran operated by East Azerbaijan Province Ski Federation.  The resort is located in the northern foothills of Mishodaghi.  It is one of the oldest ski resorts in Iran that still operating.  The resort have a ski lift.  Ski season in Yam resort depends on winter precipitation each year which normally starts in January and continues till end of March.  This resort also considered a summer resort and attracts visitors from nearby cities.

Vail Resorts: Vail Resorts, Inc. runs four ski resorts in Colorado (Vail Ski Resort, Beaver Creek Resort, Keystone Resort, and Breckenridge Ski Resort), three in Lake Tahoe (Heavenly Mountain Resort, Kirkwood Mountain Resort, Northstar California), one in Utah (Park City Mountain Resort in Park City), one in Vermont (Stowe Mountain Resort), one in Minnesota (Afton Alps), one in Michigan (Mount Brighton), one in Wisconsin (Wilmot Mountain), one in New South Wales, Australia (Perisher Ski Resort), one in British Columbia (Whistler Blackcomb), and a summer resort in Wyoming.  They also own luxury resort hotels throughout the world.  The company trades on the New York Stock Exchange, symbol MTN.  The company is headquartered in Broomfield, Colorado.

Kineo Cottage Row Historic District: The Kineo Cottage Row Historic District encompasses a collection of seven summer resort cottages on the Mount Kineo peninsula, which juts into Moosehead Lake in the central Maine.  The cottages were built between 1900 and 1912 as part of the Mount Kineo resort complex, one of interior Maine's most successful summer resorts of the early 20th century, and are its only major surviving component.  The cottages were listed on the National Register of Historic Places in 2004.

Supporting paragraphs: Southport, Maine Squirrel Island, Maine
Answer: Squirrel Island, Maine