Question: Which Canadian-born Australian politician filled the vacancy left by the retirement of the Australian former politician who served as a member of the New South Wales Legislative Council between 1991 and 2011?

Context paragraphs:
Peter Phelps (politician): Peter Robert Phelps (born 7 May 1968) is an Australian politician.  He has been a Liberal Party member of the New South Wales Legislative Council since March 2011.  He contested the New South Wales Legislative Assembly seat of Drummoyne in the 1999 New South Wales State election.

John Ajaka: John George Ajaka (born 13 January 1956), an Australian politician, is the President of the New South Wales Legislative Council.  Until 23 January 2017, he was New South Wales Minister for Ageing from April 2014, the Minister for Disability Services from August 2013, and the Minister for Multiculturalism fom April 2015 in the second Baird government.  Ajaka is a member of the New South Wales Legislative Council since 2007, representing the Liberal Party of Australia and he is the first Liberal Party Lebanese Australian member of an Australian parliament.  Ajaka has previously served as the Minister for the Illawarra during 2013 and 2015 in the O'Farrell and first Baird government.

Don Harwin: Donald Thomas "Don" Harwin (born 5 July 1964 in Sydney), an Australian politician, is the New South Wales Minister for Resources, the Minister for Energy and Utilities, the Minister for the Arts, and the Vice-President of the Executive Council since January 2017 in the Berejiklian government.  Harwin is a member of the New South Wales Legislative Council representing the Liberal Party of Australia since 27 March 1999; and served as the twentieth President of the New South Wales Legislative Council between May 2011 and January 2017.  Harwin has been the Leader of the Government in the Legislative Council since January 2017.

Eddie Obeid: Edward Moses "Eddie" Obeid (born 25 October 1943) is an Australian former politician who served as a member of the New South Wales Legislative Council between 1991 and 2011, representing the Australian Labor Party.  He was the Minister for Fisheries and the Minister for Mineral Resources from 1999–2003.  Prior to the March 2015 expiry of his term in the Legislative Council, Obeid announced his decision to retire early on 10 May 2011, citing family reasons.

George Day (Australian politician): George Day (29 October 1826 – 13 July 1906) was an Australian politician.  He was born in the Hawkesbury River district of New South Wales on 29 October 1826.  He was elected from 1874 to 1880 as a member of the New South Wales Legislative Assembly, for the electoral district of Hume, and elected from 1880 to 1889 for the electoral district of Albury.  He then served from 1889 to 1906 in the New South Wales Legislative Council.

Melinda Pavey: Melinda Jane Pavey (née Shaw ; born 1969), an Australian politician, is the New South Wales Minister for Roads, Maritime and Freight since January 2017 in the Berejiklian government.  Pavey has been a member of the New South Wales Legislative Assembly since 2015, representing the seat of Oxley for The Nationals.  She was previously a member of the New South Wales Legislative Council between 2002 and 2015.  A former party staffer, the Coffs Harbour businesswoman became the party's youngest New South Wales MP at the age of 33.

Jan Burnswoods: Janice Carolyn Burnswoods (born 29 December 1943) is a former Australian politician.  She received a Bachelor of Arts and a Diploma of Education from the University of Melbourne, and was later employed at the University of Melbourne, the University of New South Wales and the history unit of the New South Wales Department of Education.  In 1972, she joined the Australian Labor Party at Drummoyne, and was a founder and secretary of the Drummoyne Residents' Action Group during the 1970s.  She was an Officer of the New South Wales Labor Women's Committee from 1977–1986 and an executive member of the New South Wales Teachers' Federation 1986-1991.  In 1991, she was elected to the New South Wales Legislative Council as a Labor member, serving until her retirement in 2007.

Wes Fang: Wesley (Wes) Joseph Fang is an Australian politician.  He has been a NSW Nationals member of the New South Wales Legislative Council since 9 August 2017, when he filled a casual vacancy caused by the resignation of Duncan Gay.  Fang has Singaporean heritage and is the first Asian-Australian to represent the Nationals in the New South Wales Parliament.  Fang holds a degree in aviation from the University of New South Wales and was formerly a pilot with the Australian Army and Telstra Child Flight, a director of the Wagga Wagga Business Chamber and founded the Wagga Ratepayers' Community.

Fred Nile: Frederick John "Fred" Nile ED MLC (born 15 September 1934) is an Australian politician and ordained Christian minister.  Nile has been a member of the New South Wales Legislative Council since 1981, except for a period in 2004 when he resigned to unsuccessfully contest the Australian Senate at the 2004 federal election.  Nile was re-elected at the March 2007 state election and is currently Assistant President of the Legislative Council.  He is the longest-serving member of the New South Wales parliament.  In November 2009 he stated his decision to retire in 2015, but later announced his decision to accept the Christian Democratic Party (CDP) nomination for the NSW Legislative Council at the New South Wales State Election on 28 March 2015.

Walt Secord: Walter "Walt" Secord (born 25 December 1964) is a Canadian-born Australian politician.  He has been an Australian Labor Party member of the New South Wales Legislative Council since May 2011, when he was elected to fill the vacancy left by the retirement of Eddie Obeid.  Secord was previously the Chief of Staff to former NSW Premier, Kristina Keneally.

Supporting paragraphs: Walt Secord Eddie Obeid
Answer: Walter "Walt" Secord