Question: In 2016, a tree on Crown Lands was chosen to become the City of Boston, Massachusetts' official Christmas tree, also known as ?

full_context: Document 1: Cape Breton Highlands National Park: Cape Breton Highlands National Park (French: "parc national des Hautes-Terres-du-Cap-Breton" ) is located on northern Cape Breton Island in the province of Nova Scotia. One-third of the Cabot Trail passes through the park featuring spectacular ocean and mountain views. The park is well known for its "steep cliffs and deep river canyons that carve into a forested plateau bordering the Atlantic Ocean". The park was the first National Park in the Atlantic provinces of Canada and covers an area of 948 km. It is one of 42 in Canada's system of national parks.
Document 2: Waternish: Waternish or Bhatairnis/Vaternish is a peninsula approximately 12 km long on the island of Skye, Scotland, situated between Loch Dunvegan and Loch Snizort in the northwest of the island, and traditionally inhabited and owned by Clan MacLeod whose clan seat is at the nearby Dunvegan Castle. The current clan chief is Hugh Macleod of Macleod. It contains the hamlets of Stein and Lusta in Loch Bay to the south east, Halistra, Hallin and Trumpan further north and Gillen to the west, all of which are accessed from the A850 road by crossing the Fairy Bridge. The highest point is Ben Geary (284 m ) and the most northerly is Waternish Point. The name Waternish is derived from the Norse "vatnenes" or "headland of the pond".
Document 3: Magnolia, Massachusetts: Magnolia is a small village in Gloucester, Massachusetts. It is located on the Manchester-by-the-Sea, Massachusetts town line in the southwestern part of the city. Straddling the town line between the two communities is Surf Park, a two-acre swath of land that has scenic views of Kettle Cove. Magnolia has its own library, restaurants, and shops. Another feature of Magnolia is its beach, which goes by the official name Gray Beach and is a part of Coolidge Reservation. Union Congregational Church is located in Magnolia, as is Hammond Castle. The village has its own Women's Community Club which has been in existence for over sixty years.
Document 4: Ainslie Glen, Nova Scotia: Ainslie Glen (Scottish Gaelic: "Gleann nam Màgan" ) is a small community in the Canadian province of Nova Scotia, located in Inverness County on Cape Breton Island. In 2016, a tree on Crown Lands was chosen to become the Boston Christmas Tree.
Document 5: Milwaukee City Christmas Tree: The Milwaukee City Christmas Tree (1913–1995; 2006–present), also known as Milwaukee City Holiday Tree (1995–2006) is a pine tree that is placed at city hall and decorated by the city council of Milwaukee, Wisconsin, during the Christmas holiday season. The tradition began in 1913 and continues to this day.
Document 6: Tulliallan, Melbourne: Tulliallan is a new residential community alongside the suburb of Berwick at 1/805 Berwick Cranbourne Road, Cranbourne North. The community is named after the heritage-listed ‘Tulliallan’ consisting of a stone brick "Shearers Cottage" constructed circa 1860 and an "Avenue of Elms", one of the largest private ones in the municipality. These Elm Trees are estimated to be 117 years old and have been generously donated by Tulliallan’s former owner Peter White and will border the future Elm Tree Gardens community parkland.
Document 7: Singing Christmas Tree: A Singing Christmas Tree, sometimes called a Living Christmas Tree, is an artificial Christmas tree filled with singers used as part of nativity plays. First appearing in 1933 at Belhaven University, they later made their debut indoors at West High School in Denver, Colorado, and then in 1957 in Sacramento, California. Constructed of steel, the tree is actually a conical circular sector where between one-third and one-half of an actual Christmas tree is shown. Depending upon tree size, they can accompany between 30 and 450 singers. These trees can be put up by churches or communities depending upon the location. Since then, the singing Christmas tree concept has spread to Canada, the Philippines, South Korea, Switzerland and Sri Lanka. The most attended tree takes place in Knoxville, Tennessee, with 60,000 attendees in 2007.
Document 8: Green Gables (Prince Edward Island): Green Gables is the name of a 19th-century farm in Cavendish, Prince Edward Island, and is one of the most notable literary landmarks in Canada. The Green Gables farm and its surroundings are the setting for the popular "Anne of Green Gables" novels by Lucy Maud Montgomery. The site is also known as Green Gables Heritage Place. The house was designated a National Historic Site in 1985 and the complex is located within Prince Edward Island National Park.
Document 9: Halifax Explosion: The Halifax Explosion was a maritime disaster in Halifax, Nova Scotia, Canada, on the morning of 6 December 1917.  , a French cargo ship laden with high explosives, collided with the Norwegian vessel  in the Narrows, a strait connecting the upper Halifax Harbour to Bedford Basin. A fire on board the French ship ignited her cargo, causing a large explosion that devastated the Richmond district of Halifax. Approximately 2,000 people were killed by blast, debris, fires and collapsed buildings, and an estimated 9,000 others were injured. The blast was the largest man-made explosion prior to the development of nuclear weapons, releasing the equivalent energy of roughly 2.9 kilotons of TNT.
Document 10: Boston Christmas Tree: The Boston Christmas Tree is the City of Boston, Massachusetts' official Christmas tree. A tree has been lit each year since 1941, and since 1971 it has been given to the people of Boston by the people of Nova Scotia in thanks for their assistance after the 1917 Halifax Explosion. The tree is lit in the Boston Common throughout the Christmas season.
Document 11: Menstrie Castle: Menstrie Castle is a three-storey manor house in the town of Menstrie, Clackmannanshire, near Stirling, central Scotland. From the early 17th century, it was home to Sir William Alexander, 1st Earl of Stirling, who was instrumental in founding the colony of Nova Scotia. It was later owned by the Holburn or Holborne family, who were created Baronets of Menstrie in 1706. The castle was restored in the 20th century, won a Civic Trust award, and now incorporates holiday accommodation, private flats, and a museum and cafe run by the National Trust for Scotland.
Document 12: Liberty Tree: The Liberty Tree (1646–1775) was a famous elm tree that stood in Boston near Boston Common, in the years before the American Revolution. In 1765, colonists in Boston staged the first act of defiance against the British government at the tree. The tree became a rallying point for the growing resistance to the rule of Britain over the American colonies, and the ground surrounding it became known as Liberty Hall. The Liberty Tree was felled by British troops and Loyalists in 1775.
Document 13: Oak Island: Oak Island is a 57 hectare privately owned island in Lunenburg County on the south shore of Nova Scotia, Canada. The tree-covered island is one of about 360 small islands in Mahone Bay and rises to a maximum of 11 metres above sea level. The island is located 200 metres from shore and connected to the mainland by a causeway and gate. The island is best known for various theories about possible buried treasure or historical artifacts, and the associated exploration.
Document 14: Chicago Christmas Tree: The first official Christmas tree in the city of Chicago was installed in 1913 in Grant Park and lit on Christmas Eve by then-mayor Carter Harrison. This first tree was a 35 ft tall spruce tree. In December 1956 the official tree, though still installed in Grant Park (at Michigan Avenue and Congress Parkway), was not an individual tree. The tree was a combination of many smaller trees, stood 70 ft tall, and was decorated with over 4000 lights and 2000 ornaments. Beginning with Christmas 1966 the official Chicago Christmas tree was placed in Civic Center Plaza, now known as Daley Plaza. With the exception of 1981, the tree has been installed in Daley Plaza ever since.
Document 15: Vatican Christmas Tree: The Vatican Christmas Tree, also called the Saint Peter's Square Christmas Tree, is the decorated tree that is erected annually in the Saint Peter's Square directly in front of St. Peter's Basilica in the Vatican City to celebrate the Christmas holiday season.
ground_truth: Boston Christmas Tree