Question: What number prime minister of Canada chaired the Twenty-Eighth Canadian Ministry?

Context paragraphs:
20th Canadian Ministry: The Twentieth Canadian Ministry was the first cabinet chaired by Prime Minister Pierre Trudeau.  It governed Canada from 20 April 1968 to 4 June 1979, including all of the 28th, 29th, and 30th Canadian Parliaments.  The government was formed by the Liberal Party of Canada.  Trudeau was also Prime Minister in the Twenty-Second Canadian Ministry.

Stephen Harper: Stephen Joseph Harper {'1': ", '2': ", '3': ", '4': "} (born April 30, 1959) is a Canadian entrepreneur and retired politician who served as the 22nd Prime Minister of Canada, from February 6, 2006 to November 4, 2015.  He was the first prime minister to come from the modern Conservative Party of Canada, which was formed by a merger of the Progressive Conservative Party and the Canadian Alliance.

1st Canadian Ministry: The First Canadian Ministry was the first cabinet chaired by Prime Minister Sir John A. Macdonald.  It governed Canada from 1 July 1867 to 5 November 1873, including all of the 1st Canadian Parliament as well as the first eight months of the 2nd.  The government was formed by the Liberal-Conservative Party in coalition with the old Conservative Party of Canada.  Macdonald was also Prime Minister in the Third Canadian Ministry.

28th Canadian Ministry: The Twenty-Eighth Canadian Ministry was the combined Cabinet, chaired by Prime Minister Stephen Harper, and Ministers that governed Canada from the beginning of the 39th Parliament to the end of the 41st Parliament.  Its original members were sworn into the Queen's Privy Council for Canada on February 6, 2006, exactly two weeks after the 2006 election, and nine weeks and six days after the end of the 38th Canadian Parliament.  Smaller than its recent predecessors, the Conservative Cabinet originally consisted of 27 members, including the prime minister.  On January 4, 2007, five Secretaries of State were added to the ministry who are not members of the Cabinet itself.  The cabinet resigned on the morning of November 4, 2015.

13th Canadian Ministry: The Thirteenth Canadian Ministry was the second cabinet chaired by Prime Minister Arthur Meighen.  It governed Canada from 29 June 1926 to 25 September 1926, including only the last three months of the 15th Canadian Parliament, all cabinet ministers were acting cabinet ministers as Meighen hadn't been given the confidence of the house, and any cabinet ministers appointed by him would have had to resign their seats and run for re-election.  The government was formed by the old Conservative Party of Canada.  Meighen was also Prime Minister in the Eleventh Canadian Ministry.

9th Canadian Ministry: The Ninth Canadian Ministry was the first cabinet chaired by Prime Minister Sir Robert Borden.  It governed Canada from 10 October 1911 to 12 October 1917, including only the 12th Canadian Parliament.  The government was formed by the old Conservative Party of Canada.  The Conservatives governed in coalition with the Liberal-Conservative Party until 12 October 1916 when the last Liberal-Conservative cabinet minister, Sam Hughes, was dismissed.  Borden was also Prime Minister in the Tenth Canadian Ministry, which he formed for the coalition government with the Liberals.

22nd Canadian Ministry: The Twenty-Second Canadian Ministry was the second cabinet chaired by Prime Minister Pierre Trudeau.  It governed Canada from 3 March 1980 to 30 June 1984, including most of the 32nd Canadian Parliament.  The government was formed by the Liberal Party of Canada.  Trudeau was also Prime Minister in the Twentieth Canadian Ministry.

3rd Canadian Ministry: The Third Canadian Ministry was the second cabinet chaired by Prime Minister Sir John A. Macdonald.  It governed Canada from 17 October 1878 to 6 June 1891, including the 4th, 5th, and 6th Canadian Parliaments, as well as the first three months of the 7th.  The government was formed by the Liberal-Conservative Party in coalition with the old Conservative Party of Canada.  Macdonald was also Prime Minister in the First Canadian Ministry.

10th Canadian Ministry: The Tenth Canadian Ministry was the second cabinet chaired by Prime Minister Sir Robert Borden.  It governed Canada from 12 October 1917 to 10 July 1920, including most of the 13th Canadian Parliament.  The government was formed by the Unionists, a war-time coalition between the old Conservative Party of Canada and some members of the Liberal Party of Canada.  Borden was also Prime Minister in the Ninth Canadian Ministry.

11th Canadian Ministry: The Eleventh Canadian Ministry was the first cabinet chaired by Prime Minister Arthur Meighen.  It governed Canada from 10 July 1920 to 29 December 1921, including only the last year of the 13th Canadian Parliament.  The government was formed by the National Liberal and Conservative Party.  Meighen was also Prime Minister in the Thirteenth Canadian Ministry.

Supporting paragraphs: 28th Canadian Ministry Stephen Harper
Answer: 22nd