Question: In which strait did two cargo ships collide in an accident that postponed the election where Peter Francis Martin was elected by acclamation?

full_context: Document 1: Joseph William Martin Jr.: Joseph William Martin Jr. (November 3, 1884 – March 6, 1968) was an American politician who served as the 44th Speaker of the United States House of Representatives from 1947 to 1949 and 1953 to 1955; he represented the district covering North Attleborough, Massachusetts. He was the only Republican to serve as Speaker in a sixty-four year period from 1931 to 1995. He was a "compassionate conservative" who opposed the New Deal and supported the conservative coalition of Republicans and southern Democrats, especially on opposing labor unions.
Document 2: 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 3: Peter Francis Martin: Peter Francis Martin (January 13, 1856 – May 2, 1935) was a contractor and political figure in Nova Scotia, Canada. He represented Halifax in the House of Commons of Canada from 1917 to 1921 as a Unionist Party member. Martin was elected by acclamation in the Khaki Election of 1917; in Halifax, the election was postponed after the Halifax Explosion and Martin's Liberal opponent withdrew in a show of post-explosion unity. Martin replaced Prime Minister Robert Borden, who had run (and won) in Kings County. Martin sat for Halifax division in the Senate of Canada from 1921 to 1935 as a Conservative.
Document 4: 1924 Nixon Nitration Works disaster: The 1924 Nixon Nitration Works disaster was an explosion and fire that claimed many lives and destroyed several square miles of New Jersey factories. It began on Saturday morning, March 1, 1924, when an explosion destroyed a building in Nixon, New Jersey (an area within present-day Edison, New Jersey) used for processing ammonium nitrate. The 11:15 a.m. explosion touched off fires in surrounding buildings in the Nixon Nitration Works that contained other highly flammable materials. The disaster killed twenty people, destroyed forty buildings, and demolished the “tiny industrial town of Nixon, New Jersey.”
Document 5: Francis Crossley: Sir Francis Crossley, 1st Baronet, of Halifax (Halifax, 26 October 1817 – 5 January 1872), was a British carpet manufacturer, philanthropist and Liberal Party politician.
Document 6: Alexander McMartin: Alexander McMartin (1788-July 12, 1853) was a businessman and political figure in Upper Canada. He was the first person born in Upper Canada to serve in its Legislative Assembly.
Document 7: Peter Trent: Peter Francis Trent (born 5 January 1946) is an English-born Canadian businessman and politician. He was mayor of Westmount, Quebec until his retirement in April, 2017. He was first elected as councillor in 1983. He served as mayor from 1992 to 2001, he left politics at that time due to the forced merger with the City of Montreal. He again became Mayor of Westmount by acclamation on the November 1, 2009 municipal election.
Document 8: Ammonium nitrate disasters: When heated, ammonium nitrate decomposes non-explosively into gases including oxygen; however, it can be induced to decompose explosively by detonation. Large stockpiles of the material can be a major fire risk due to their supporting oxidation, and may also detonate, as happened in the Texas City disaster of 1947, which led to major changes in the regulations for storage and handling.
Document 9: Texas City disaster: The Texas City disaster was an industrial accident that occurred April 16, 1947, in the Port of Texas City. It was the deadliest industrial accident in U.S. history, and one of the largest non-nuclear explosions. Originating with a mid-morning fire on board the French-registered vessel SS "Grandcamp" (docked in the port), her cargo of approximately 2,200 tons (approximately 2,100 metric tons) of ammonium nitrate detonated, with the initial blast and subsequent chain-reaction of further fires and explosions in other ships and nearby oil-storage facilities. It killed at least 581 people, including all but one member of the Texas City fire department. The disaster triggered the first ever class action lawsuit against the United States government, under the then-recently enacted Federal Tort Claims Act (FTCA), on behalf of 8,485 victims.
Document 10: Peter M. Brown: Peter MacLachlan Brown was born in Vancouver, like his father, Ralph, and grandfather before him. Peter Brown’s grandfather Brenton was a well-connected businessman and power broker of his time, head of the Crown Life Insurance Co., onetime president of the Vancouver Board of Trade, and a founder of the right-of-centre municipal NPA party. His grandson would one day follow in his footsteps.
Document 11: RMS Titanic: RMS "Titanic" ( ) was a British passenger liner that sank in the North Atlantic Ocean in the early morning hours of 15 April 1912, after it collided with an iceberg during its maiden voyage from Southampton to New York City. There were an estimated 2,224 passengers and crew aboard the ship, and more than 1,500 died, making it one of the deadliest commercial peacetime maritime disasters in modern history. The RMS "Titanic" was the largest ship afloat at the time it entered service and was the second of three "Olympic"-class ocean liner s operated by the White Star Line. The Titanic was built by the Harland and Wolff shipyard in Belfast. Thomas Andrews, her architect, died in the disaster.
Document 12: Shattered City: The Halifax Explosion: Shattered City: The Halifax Explosion is a two-part miniseries produced in 2003 by CBC Television. It presents a fictionalized version of the Halifax Explosion, a 1917 catastrophe that destroyed much of the Canadian city of Halifax. It was directed by Bruce Pittman and written by Keith Ross Leckie. The Film Stars Vincent Walsh, Tamara Hope, Clare Stone, Zachary Bennett, Shauna MacDonald and Ted Dykstra.
Document 13: Edward N. Martin: Edward N. Martin is the president and CEO of HJ Martin and Son, a Green Bay, Wisconsin-based interior and specialty contractor. Edward joined the company in 1978, and became the third-generation of the family involved in the business.
Document 14: Black Tom explosion: The Black Tom explosion on July 30, 1916, in Jersey City, New Jersey, was an act of sabotage by German agents to destroy American-made munitions that were to be supplied to the Allies in World War I. This incident, which happened prior to American entry into the war, is also notable for causing damage to the Statue of Liberty.
Document 15: Deepwater Horizon explosion: The "Deepwater Horizon" drilling rig explosion was the April 20, 2010, explosion and subsequent fire on the "Deepwater Horizon" semi-submersible Mobile Offshore Drilling Unit (MODU), which was owned and operated by Transocean and drilling for BP in the Macondo Prospect oil field about 40 mi southeast off the Louisiana coast. The explosion and subsequent fire resulted in the sinking of the "Deepwater Horizon" and the deaths of 11 workers; 17 others were injured. The same blowout that caused the explosion also caused a massive offshore oil spill in the Gulf of Mexico, considered the largest accidental marine oil spill in the world, and the largest environmental disaster in U.S. history.
ground_truth: the Narrows