Question: The Port of Washington is located in what densely populated neighborhood in Boston, Massachusetts?

Context paragraphs:
East Hollywood, Los Angeles: East Hollywood is a densely populated neighborhood of 78,000+ residents in the central region of Los Angeles, California.  It is notable for being the site of Los Angeles City College, Barnsdall Park and a hospital district.  There are seven public and five private schools, as well as a branch of the Los Angeles Public Library and three hospitals.  Almost two-thirds of the people living there were born outside the United States and 90% were renters.  In 2000 the neighborhood had high percentages of never-married people and of single parents.

Transportation in Boston: The Boston transportation system includes roadway, subway, regional rail, air, and sea options for passenger and freight transit in Boston, Massachusetts.  The Massachusetts Port Authority (Massport) operates the Port of Boston, which includes a container shipping facility in South Boston, and Logan International Airport, in East Boston.  The Massachusetts Bay Transportation Authority (MBTA) operates bus, subway, short distance rail, and water ferry passenger services throughout the city and region.  Amtrak operates passenger rail service to and from major northeastern cities.  A major bus terminal at South Station is served by varied intercity bus companies.  The city is bisected by major highways I-90 and I-93, the intersection of which has undergone a major renovation, nicknamed the Big Dig.

South Boston: South Boston is a densely populated neighborhood of Boston, Massachusetts, located south and east of the Fort Point Channel and abutting Dorchester Bay.  South Boston, most popularly known as Southie, was once a predominantly working class Irish Catholic community, but has become increasingly desirable among young professionals and families.

Wellington-Harrington: Wellington-Harrington, also known as Area 3, is a neighborhood in Cambridge, Massachusetts, bounded by Hampshire Street and Broadway on the southwest, the Grand Junction railroad tracks on the east, and the Somerville town line on the north.  In 2010, it had a population of 6,516 residents living in 2,996 households, making it the second most densely populated neighborhood in Cambridge, after Mid-Cambridge.  The median household income was $50,593.

Great Podil fire: The 1811 Great fire of Podil (Ukrainian: Велика пожежа, "Velyka pozhezha" ) occurred on the morning of July 9, 1811 in the historical and commercial neighborhood of Podil in Kiev ("Kyiv"), the capital of Ukraine.  The fire lasted for three days and almost destroyed the whole neighborhood.  Before the fire, Podil was the city's most densely populated neighborhood; out of 3,672 households in the city, 2,068 were located in the Podil.

Diobu, Port Harcourt: Diobu is a densely populated neighborhood of Port Harcourt, Rivers State, located within the Port Harcourt metropolis.

Cottage–Freeman Historic District: The Cottage–Freeman Historic District is a historic district on Cottage St. Freeman St., from Commonwealth Ave. to Ten Mile River and Park Lane in North Attleborough, Massachusetts.  It encompasses a densely populated neighborhood which was developed predominantly in the two decades beginning c. 1890, built to house workers in the area's jewelry industry.  Most of it consists of vernacular architecture of the period, although there are some houses which date to the early 19th century.

Old North St. Louis: Old North St. Louis is a neighborhood just north and slightly west of the downtown area of St. Louis, Missouri.  Known for the landmark Crown Candy Kitchen, historic 19th century brick homes, and its award-winning community gardens, the neighborhood now known as Old North St. Louis was established as the independent village of North St. Louis in 1816 and was annexed by the City of St. Louis in 1841.  After many generations as a very densely populated neighborhood, Old North St. Louis experienced several decades of population losses and deterioration of the community's housing stock.  Over the past several years, however, the community has started to experience a dramatic revitalization led by the community-based Old North St. Louis Restoration Group, a non-profit organization.  ONSLRG pursues a mission of revitalizing the physical and social dimensions of the Old North St. Louis neighborhood in a manner that respects the neighborhood's historic, cultural and urban character.

Belltown, Seattle: Belltown is the most densely populated neighborhood in Seattle, Washington, United States, located on the city's downtown waterfront on land that was artificially flattened as part of a regrading project.  Formerly a low-rent, semi-industrial arts district, in recent decades it has transformed into a neighborhood of trendy restaurants, boutiques, nightclubs, and residential towers as well as warehouses and art galleries.  The area is named after William Nathaniel Bell, on whose land claim the neighborhood was built.

Ash Street School (Worcester, Massachusetts): The Ash Street School is an historic school building on Ash Street in Worcester, Massachusetts.  The Italianate style school was built as part of a wave of school construction in the city between 1848 and 1855.  It is a square three story brick building with a low hip roof.  Each facade has four bays, separated by piers that rise to corbelling just below the roof line.  It originally had a cupola, but that has been removed.  At the time of its construction, the area where it stands was a densely populated neighborhood; it has since been largely redeveloped for industrial uses.

Supporting paragraphs: Transportation in Boston South Boston
Answer: South Boston