Question: In which year did Jack Pickersgill serve as Cabinet member for Lester B. Pearson?

Context articles: Lester B. Pearson High School (Calgary)
Lester B. Pearson
Lester B. Pearson Building
Pearson College UWC
Toronto Pearson International Airport
James Wilson (Secretary of Agriculture)
Lester B. Pearson High School (Burlington)
Jack Pickersgill
Lester B. Pearson High School (Montreal)
Lester B. Pearson Vocational College

Lester B. Pearson High School is a public senior high school located in Calgary, Alberta, Canada administered by the Calgary Board of Education.
 The school is named for Nobel Laureate and Canadian Prime Minister Lester B. Pearson.
Lester Bowles "Mike" Pearson (23 April 1897 – 27 December 1972) was a Canadian scholar, statesman, soldier and diplomat, who won the Nobel Peace Prize in 1957 for organizing the United Nations Emergency Force to resolve the Suez Canal Crisis.
 He was the 14th Prime Minister of Canada from 22 April 1963 to 20 April 1968, as the head of two back-to-back Liberal minority governments following elections in 1963 and 1965.
The Lester B. Pearson Building is the headquarters of the Canadian Department of Global Affairs.
 It is located at 125 Sussex Drive in the Lower Town neighbourhood of Ottawa, Ontario, and was built between 1968 and 1973.
 It was officially opened on August 1, 1973 by Queen Elizabeth II.
 It is named after Lester B. Pearson, former external affairs minister, Nobel Peace Prize winner and Prime Minister of Canada.
The Lester B. Pearson United World College of the Pacific (Pearson College UWC) is one of seventeen United World Colleges (UWC) around the world.
 It is named after the late Canadian Prime Minister Lester Bowles Pearson, winner of the 1957 Nobel Peace Prize, and an early champion of the College.
 The mission of the UWC movement and of the school is to ""make education a force to unite people, nations and cultures for peace and a sustainable future"".
 The college follows the International Baccalaureate curriculum, covering the final year of high school and a pre-university year for up to 100 students a year, hailing from nearly 90 countries.
Toronto Pearson International Airport (IATA: YYZ, ICAO: CYYZ) , officially named Lester B. Pearson International Airport (frequently shortened to Toronto Pearson, Pearson Airport, or simply Pearson), is an international airport serving the city of Toronto, Ontario, Canada, the Greater Toronto Area, and the Golden Horseshoe, an urban agglomeration of 9.2 million people.
 The airport is located 22.5 km northwest of Downtown Toronto, with the bulk of the airport (including the two main terminals) located in the adjacent city of Mississauga, and a small portion of the airfield extending into Etobicoke, Toronto's western district.
 The airport is named in honour of Toronto-born Lester B. Pearson, Nobel Peace Prize Laureate and 14th Prime Minister of Canada.
James "Tama Jim" Wilson (August 16, 1835 – August 26, 1920) was a Scottish-born American politician who served as United States Secretary of Agriculture for sixteen years during three presidencies, from 1897 to 1913.
 He holds the record as the longest-serving United States Cabinet member, and if one counts his day and a half under Woodrow Wilson, the only cabinet member to serve under four consecutive Presidents.
Lester B. Pearson High School is a high school located in Burlington, Ontario, Canada, administered by the Halton District School Board.
 Founded in 1976, the school is named after former Prime Minister Lester B. Pearson.
John Whitney "Jack" Pickersgill, {'1': ", '2': ", '3': ", '4': "} (June 23, 1905 – November 14, 1997) was a Canadian civil servant and politician.
 He was born in Ontario, but was raised in Manitoba.
 He was the Clerk for the Canadian Government's Privy Council in the early 1950s.
 He was first elected to federal parliament in 1953, representing a Newfoundland electoral district and serving in prime minister Louis St. Laurent's cabinet.
 In the mid-1960s, he served again in cabinet, this time under prime minister Lester B. Pearson.
 He resigned from parliament in 1967 to become the president of the Canadian Transport Commission.
 He was awarded the highest level of the Order of Canada in 1970.
 In his later years, he wrote books on Canadian history, and he died in 1997 in Ottawa.
Lester B. Pearson High School (French: École secondaire Lester B. Pearson ) is an anglophone secondary school located in Montréal-Nord, a borough of Montreal, Quebec, Canada.
 It is part of the English Montreal School Board.
 It was established in 1976.
 The Canadian student press, Learning for a Cause, was founded here in 2004.
 The school is also known for its unique "Sport-Etudes" or student-athlete academic program.
The Lester B. Pearson International Career Programs (LBPICP) is part of the International Department under the Lester B. Pearson School Board (LBPSB, French: "Commission scolaire Lester B. Pearson") which is a Designated Learning Institution.
 It is one of the largest school boards on the island of Montreal and one of the nine English school boards in the province of Quebec.