Question: The Centennial Flame was lit in the presence of Canada's acting Prime Minister who was born in what year?

Context paragraphs:
Deputy prime minister: A deputy prime minister or vice prime minister is, in some countries, a government minister who can take the position of acting prime minister when the prime minister is temporarily absent.  The position is often likened to that of a vice president, but is significantly different even though both positions are "number two" offices.  The position of deputy prime minister should not be confused with the Canadian Deputy Minister of the Prime Minister of Canada, a nonpolitical civil servant position.  Also, the Deputy Prime Minister of Canada does not act as a "number two".

Deputy Prime Minister of Finland: The Deputy Prime Minister of Finland is a member of the Government who becomes the acting Prime Minister when the actual Prime Minister is temporarily unable to discharge his or her duties.  The Deputy Prime Minister is appointed by the Government and traditionally comes from the second largest party of a coalition government.  In recent years he/she has usually been Minister of Finance as well.  The current Deputy Prime Minister of Finland is Petteri Orpo, Minister of Finance.

Sam Abal: Samuel Tei "Sam" Abal (born 26 June 1958) is a Papua New Guinean politician.  Abal, who previously served as Foreign Minister from August 2007 to December 2010, became the Deputy Prime Minister of the country in a cabinet reshuffle by Michael Somare on 7 December 2010.  He further became acting Prime Minister of Papua New Guinea on 13 December 2010, when Prime Minister Somare stepped down from office to face a tribunal regarding allegations of financial mismanagement.  His tenure as acting Prime Minister ended on 2 August 2011, when Peter O'Neill won a parliamentary vote to be appointed as Prime Minister.

List of Prime Ministers of Sweden: The Prime Minister (Swedish: "statsminister" , literally "Minister of the State") is the head of government in Sweden.  Before the creation of the office of a Prime Minister in 1876, Sweden did not have a head of government separate from its head of state, namely the King, in whom the executive authority was vested.  Louis De Geer, the architect behind the new bicameral Riksdag of 1866 that replaced the centuries-old Riksdag of the Estates, became the first officeholder in 1876.  The current Prime Minister of Sweden is Stefan Löfven, leader of the Swedish Social Democratic Party.  Below is the list and statistics of Prime Ministers of Sweden since the creation of the office in 1876.  The list does not include acting prime ministers, the only example to date is Östen Undén who served as acting prime minister from 6 to 11 October 1946.

Deputy Prime Minister of Singapore: The Deputy Prime Minister of the Republic of Singapore is the deputy head of the government of the Republic of Singapore.  The role of Deputy Prime Minister is the second highest post and senior Cabinet Minister in Singapore.  The holder will sometimes assume the role of Acting Prime Minister when the PM is temporarily absent from Singapore.  Since the mid-1980s, Singapore has usually had two Deputy Prime Ministers at a time.  Only Ong Teng Cheong and Tony Tan (who later became Singaporean presidents) served under more than one Prime Minister during their time as Deputy Prime Minister.

Cabinet of Israel: The Government of Israel (officially: Hebrew: ממשלת ישראל‎ ‎ "Memshelet Yisrael") exercises executive authority in the State of Israel.  It consists of ministers who are chosen and led by the prime minister.  The composition of the government must be approved by a vote of confidence in the Knesset (the Israeli parliament).  Under Israeli law, the prime minister may dismiss members of the government, but must do so in writing, and new appointees must be approved by the Knesset.  Most ministers lead ministries, though some are ministers without portfolio.  Most ministers are members of the Knesset, though only the Prime Minister and the "designated acting prime minister" are required to be Knesset members.  Some ministers are also called deputy and vice prime ministers.  Unlike the designated acting prime minister, these roles have no statutory meanings.  The government operates in accordance with the Basic Law.  It meets on Sundays weekly in Jerusalem.  There may be additional meetings if circumstances require it.  The prime minister convenes these meetings.

Ömürbek Babanov: Ömürbek Toktogulovich Babanov (Kyrgyz: Өмүрбек Токтогулович Бабанов; born 15 January 1970) is a Kyrgyz politician who was Prime Minister of Kyrgyzstan from 1 December 2011 to 1 September 2012.  Before his appointment as Prime Minister, he was Deputy Prime Minister in the Government of Almazbek Atambayev.  He was also acting Prime Minister from 23 September 2011 until 14 November 2011, as the Prime Minister Atambayev was a candidate in the presidential election.  He again became acting Prime Minister on 1 December 2011 when Atambayev took office as President.  He was confirmed by Parliament on 23 December 2011.  On 1 September 2012 Babanov resigned as 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.

Acting prime minister: An acting prime minister is a cabinet member (often in Westminster system countries) who is serving in the role of prime minister, whilst the individual who normally holds the position is unable to do so.  The role is often performed by the deputy prime minister (where that position exists), or by another senior minister.  The office is commonly used when the prime minister is absent from the territory of that nation, or when the prime minister is in ill health.

Centennial Flame: Located on Parliament Hill in Ottawa, Ontario, Canada, the Centennial Flame (French: "Flamme du centenaire" ) commemorates Canada’s 100th anniversary as a Confederation.  The Flame was first lit as the climax of the centennial celebrations of January 1, 1967, in the presence of then Prime Minister Lester B. Pearson.  He was joined on the hill by leader of the Opposition and former Prime Minister, John Diefenbaker, and Secretary of State, who was in charge of the Centennial, Judy LaMarsh as well as thousands of onlookers.  The Flame is fuelled by natural gas and surrounded by a fountain whose ledge contains the shields of 12 of Canada’s provinces and territories—Nunavut is absent as it was not created until 1999.

Supporting paragraphs: Centennial Flame Lester B. Pearson
Answer: 1897