Question: FOR HOW LONG DID NOBEL PEACE PRIZE WINNER, INVOLVED IN UNEF ESTABLISHMENT, PRIME MINISTER OF CANADA?
Context: Inkosi Albert John Lutuli (commonly spelled Luthuli; c. 1898 – 21 July 1967), also known by his Zulu name Mvumbi, was a South African teacher, activist, Nobel Peace Prize winner, and politician.  Luthuli was elected president of the African National Congress (ANC) in 1952, at the time an umbrella organisation that led opposition to the white minority government in South Africa, and served until his accidental death.  He was awarded the 1960 Nobel Peace Prize for his role in the non-violent struggle against apartheid.  He was the first African, and the first person from outside Europe and the Americas, to be awarded the Nobel Peace Prize. 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. Irwin Martin Abrams (February 24, 1914 – December 16, 2010) was a long-time professor of history at Antioch College, a pioneer in the field of peace research, and a global authority on the Nobel Peace Prize.  His book, "The Nobel Peace Prize and the Laureates", first published in 1988 and subsequently updated and revised, is regarded as the authoritative reference work on the subject.  His other books included "Words of Peace", which brought together selections from the acceptance speeches of Nobel Peace Prize laureates, and five volumes of "Nobel Lectures in Peace". Dawn Engle is the co-founder and executive director of the non-profit organization, the PeaceJam Foundation.  The PeaceJam program was launched in February 1996 by co-founders Dawn Engle and Ivan Suvanjieff to provide the Nobel Peace Prize Laureates with a programmatic vehicle to use in working together to teach youth the art of peace.  To date, 14 Nobel Peace Laureates, including the Dalai Lama, Archbishop Desmond Tutu, Rigoberta Menchú Tum, President Oscar Arias, Adolfo Pérez Esquivel, Mairead Corrigan Maguire, Betty Williams, President José Ramos-Horta, Tawakkol Karman, Sir Joseph Rotblat (Emeritus), Leymah Gbowee, Jody Williams, Kailash Satyarthi, and Shirin Ebadi, serve as members of the PeaceJam Foundation.  To date, over one million young people from 39 countries around the world have participated in the year long, award-winning PeaceJam curricular program.  Engle and her husband Ivan Suvanjieff have been nominated for the Nobel Peace Prize fifteen times, and they were leading contenders for the 2015 Nobel Peace Prize.  Engle is the co-director of multiple documentaries, including "PEACEJAM," and co-author of the book, "PeaceJam: A Billion Simple Acts of Peace" that was published by Penguin in 2008.  She has also directed the award-winning documentary films, "Children of the Light," "", "Daughter of the Maya", and "Without A Shot Fired" which are the first four films in PeaceJam's Nobel Legacy Film Series. The Pearson Medal of Peace is an award given out annually by the United Nations Association in Canada to recognize an individual Canadian's "contribution to international service".  Nominations are made by any Canadian for any Canadian, excluding self-nominations.  The medal was first announced in 1979 and named in honour of Lester B. Pearson, Nobel Peace Prize winner and Canada's fourteenth Prime Minister.  The medal was to be selected by a jury of "eminent Canadians" and awarded by the Governor-General of Canada on United Nations Day, October 24.  After the 2004 medal was awarded to Roméo Dallaire, it was not awarded again until it was revived in 2011 to honour peace activist Ernie Regehr. The Nobel Women's Initiative was created in 2006 by six female winners of the Nobel peace prize to support women's groups around the world in campaigning for justice, peace and equality.  The six founders are Shirin Ebadi, Wangari Maathai, Rigoberta Menchú, Jody Williams, Mairead Maguire, and Betty Williams.  The only other living female Nobel peace prize winner, Aung San Suu Kyi, was under house arrest at the time of the initiative's formation.  She became an honorary member on her release in 2010.  The initiative's first conference, in 2007, focused on women, conflict and security in the Middle East. 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. Moshe (Moshik) Theumim (Hebrew: משה "מושיק" תאומים‎ ‎ ) is one of Israel's advertising pioneers.  He is the CEO of the Gitam / BBDO advertising agency in Tel Aviv.  He has served as an advisor to numerous Israeli politicians and businessmen, including Israel former Prime Minister Ehud Olmert and other cabinet ministers, notably Nobel Peace Prize winner and former Israel Prime Minister Shimon Peres and Haim Ramon. The trial of Muhammad Yunus is a "The Times of India" news article, depicting the series of trials launched by Prime Minister Sheikh Hasina of Bangladesh against Muhammad Yunus, a Nobel Peace Prize–winning economist known for his two theories, microcredit and social business, and for his work through Grameen Bank that has helped millions of poor women break the cycle of poverty.  It tells the story of how the former put the latter on trial in 2010 and ultimately removed him from Grameen Bank, citing that he was too old to run the Bank which he founded in 1983.  It also states that, in 2013, she put him on trial for a second time because he had supposedly received his earnings without the necessary permission from her government, including his Nobel Peace Prize earnings and the royalties from his book sales.  The article claims that this series of trials against Yunus has puzzled billions of people around the world, from the 8.3 million underprivileged women of Grameen Bank to US President Barack Obama.  Likening Hasina's political vendetta against Yunus to a modern-day replay of the conflict between Archimedes and General Marcellus, the article predicts that the "banker to the poor" may face a fate similar to the father of mathematics for asking Hasina not to disturb the Grameen Bank.  Vikas Bajaj wrote in the "Taking Note" editorial blog of "The New York Times" on 7 November 2013: The first United Nations Emergency Force (UNEF) was established by United Nations General Assembly to secure an end to the Suez Crisis with resolution 1001 (ES-I) on November 7, 1956.  The force was developed in large measure as a result of efforts by UN Secretary-General Dag Hammarskjöld and a Nobel Peace Prize-winning (1957) proposal and effort from Canadian Minister of External Affairs Lester B. Pearson.  The General Assembly had approved a plan submitted by the Secretary-General which envisaged the deployment of UNEF on both sides of the armistice line.
Answer: 22 April 1963 to 20 April 1968