Question: An island located south of Cape Cod in Massachusetts includes an island in Edgartown, Massachusetts, that is on wha tend of Martha's Vineyard?

Context articles: Rockland Trust
Edgartown Yacht Club
Barnstable Municipal Airport
Chappaquiddick Island
Martha's Vineyard
Cape Cod Bay
Billingsgate Island
Hyannis, Massachusetts
Cape Cod Central Railroad
Nantucket Sound

Rockland Trust is a commercial bank based in Rockland, Massachusetts that serves Southeastern Massachusetts, Coastal Massachusetts, Cape Cod, and Boston's MetroWest.
 Established in 1907 as Rockland Trust Company, it is one of few local banks that retain their original name and independent ownership after more than 100 years.
 (Rockland Trust Company is the wholly owned subsidiary of Independent Bank Corp., which is publicly traded on NASDAQ (INDB).)
 Rockland Trust is the largest publicly traded commercial bank headquartered in Massachusetts, with more than 8 billion in assets and over 1000 employees.
 Rockland Trust offers a wide range of commercial, retail, commercial banking products and services, business and consumer loans, insurance products and services, and investment management services from: 77 retail branches, 10 commercial lending centers, and 4 mortgage banking centers located throughout Eastern Massachusetts and on Cape Cod; and 4 investment management offices located in Southeastern Massachusetts, on Cape Cod, and in Rhode Island.
 Corporate headquarters are in Hanover, Massachusetts.
The Edgartown Yacht Club is a private yacht club located in Edgartown, Massachusetts on the island of Martha's Vineyard.
 The club was founded on January 5, 1905, and Edward H. Raymond was named its first commodore.
 The Edgartown Yacht Club's current clubhouse was completed in 1927, and is located on Dock Street in downtown Edgartown.
Barnstable Municipal Airport (IATA: HYA, ICAO: KHYA, FAA LID: HYA) , also known as Boardman/Polando Field, is a public airport located on Cape Cod, one mile (1.6 km) north of the central business district of Hyannis, in Barnstable County, Massachusetts, United States.
 This airport is publicly owned by Town of Barnstable.
 It is Cape Cod's major airport as well as an air hub for the Cape and the Islands (Martha's Vineyard and Nantucket).
 The airport is served by scheduled commercial flights as well as charters and general aviation.
 Barnstable Municipal Airport served as a hub for Nantucket-based commuter airline Island Airlines until its shutdown in 2015.
Chappaquiddick Island (Massachusett language: "Noepe" "tchepi-aquidenet"; colloquially known as "Chappy"), a part of the town of Edgartown, Massachusetts, is a small peninsula and occasional island on the eastern end of Martha's Vineyard.
 Norton Point, a narrow barrier beach, connects Martha's Vineyard and Chappaquiddick between Katama and Wasque (pronounced "way-sqwee").
 Occasional breaches occur due to hurricanes and strong storms separating the islands for periods of time.
 Most recently, the two were separated for 8 years from 2007 to 2015.
 Though both land forms have, over the course of history, mostly been connected to one another, Chappaquiddick is nevertheless referred to as an island.
Martha's Vineyard (Wampanoag: "Noepe" , , often called just "the Vineyard") is an island located south of Cape Cod in Massachusetts that is known for being an affluent summer colony.
 It includes the smaller Chappaquiddick Island which is usually connected to the Vineyard, though storms and hurricanes have been known to separate the two.
 The last such separation of the islands was in 2007 and the two islands are again connected as of April 2, 2015.
Cape Cod Bay is a large bay of the Atlantic Ocean adjacent to the U.S. state of Massachusetts.
 Measuring 604 sqmi below a line drawn from Brant Rock in Marshfield to Race Point in Provincetown, Massachusetts, it is enclosed by Cape Cod to the south and east, and Plymouth County, Massachusetts, to the west.
 To the north of Cape Cod Bay lie Massachusetts Bay and the Atlantic Ocean.
 Cape Cod Bay is the southernmost extremity of the Gulf of Maine.
 Cape Cod Bay is one of the bays adjacent to Massachusetts that give it the name Bay State.
 The others are Narragansett Bay, Buzzards Bay, and Massachusetts Bay.
Billingsgate Island, also sometimes known as Bellingsgate Island, was an island off Cape Cod in Massachusetts in the United States.
 Originally settled as a fishing and whaling community as part of the town of Eastham, Massachusetts, Billingsgate Island was for a long time the site of a lighthouse used as a navigational aid in Cape Cod Bay.
 It is sometimes known by local historians as the Atlantis of Cape Cod.
Hyannis is the largest of the seven villages in the town of Barnstable, Massachusetts, in the United States.
 It is the commercial and transportation hub of Cape Cod and was designated an urban area as of the 1990 census.
 Because of this, many refer to Hyannis as the "Capital of the Cape".
 It contains a majority of the Barnstable Town offices and two important shopping districts: the historic downtown Main Street and the Route 132 Commercial District, including Cape Cod Mall and Independence Park, headquarters of Cape Cod Potato Chips.
 Cape Cod Hospital in Hyannis is the largest on Cape Cod.
The Cape Cod Central Railroad is a heritage railroad located on Cape Cod, Massachusetts.
 It operates on a rail line known as the Cape Main Line which is owned by Massachusetts Department of Transportation.
 The line was previously owned and operated by the Cape Cod Railroad, the Old Colony Railroad, and later the New Haven Railroad, each of which operated passenger trains on the line from 1854 to 1959.
 Although it is the namesake of the Cape Cod Central Railroad (1861–68), the two companies are unrelated.
 This company, however, is the first of this brand name to not be a railroad company just on paper.
Nantucket Sound is a roughly triangular area of the Atlantic Ocean offshore from the U.S. state of Massachusetts.
 It is 30 mi long and 25 mi wide, and is enclosed by Cape Cod on the north, Nantucket on the south, and Martha's Vineyard on the west.
 Between Cape Cod and Martha's Vineyard it is connected to the Vineyard Sound.
 Ports on Nantucket Sound include Nantucket and Hyannis, Massachusetts.