Table:
text: Liberal Party of Canada
History of leaders
History of leaders
Name_ Term_start Term_end Date_of_Birth Date_of_Death
Pierre Trudeau 1968 1984 October 18, 1919 September 28, 2000
John Turner 1984 1990 June 7, 1929 living
Jean Chrétien 1990 2003 January 11, 1934 living
Paul Martin 2003 2006 August 28, 1938 living
Bill Graham 2006 2006 March 17, 1939 living
Stéphane Dion 2006 2008 September 28, 1955 living
Michael Ignatieff 2008 2011 May 12, 1947 living
Bob Rae 2011 2013 August 2, 1948 living
Justin Trudeau 2013 Incumbent December 25, 1971 living

text: Liberal Party of Canada
History of leaders
History of leaders
Name_ Term_start Term_end Date_of_Birth Date_of_Death
George Brown 1867 1867 November 29, 1818 May 9, 1880
Edward Blake 1869 1870 October 13, 1833 March 1, 1912
Alexander Mackenzie 1873 1880 January 28, 1822 April 17, 1892
Edward Blake 1880 1887 October 13, 1833 March 1, 1912
Wilfrid Laurier 1887 1919 November 20, 1841 February 17, 1919
Daniel Duncan McKenzie 1919 1919 January 8, 1859 June 8, 1927
William Lyon Mackenzie King 1919 1948 December 17, 1874 July 22, 1950
Louis St. Laurent 1948 1958 February 1, 1882 July 25, 1973
Lester B. Pearson 1958 1968 April 23, 1897 December 27, 1972

Question: Which leader born December 17, 1874 began his tenure before 1984 for the history of leaders of the Liberal Party of Canada?