Question: A by-election was held on 28 August 1909 triggered by the death of an Australian politician who was a  prominent member of what?

Context paragraphs:
Miranda state by-election, 2013: A by-election for the New South Wales Legislative Assembly seat of Miranda occurred on 19 October 2013.  The by-election was triggered by the resignation of Liberal member Graham Annesley, which was announced on 28 August 2013.  Labor's Barry Collier won the seat with a 55 percent two-party vote from a 26-point two-party swing, the largest swing in New South Wales history.

Mackellar by-election, 1994: The 1994 Mackellar by-election was held in the Australian electorate of Mackellar in New South Wales on 26 March 1994.  The by-election was triggered by the resignation of the sitting member, the Liberal Party of Australia's Jim Carlton on 14 January 1994.  The writ for the by-election was issued on 18 February 1994.  On the same day a by-election was held in Warringah.

Isaacs by-election, 2000: The 2000 Isaacs by-election was held in the Australian electorate of Isaacs in Victoria on 12 August 2000.  The by-election was triggered by the death of the sitting member, the Australian Labor Party's Greg Wilton on 14 June 2000.  The writ for the by-election was issued on 30 June 2000.

Cunningham by-election, 2002: The 2002 Cunningham by-election was held in the Australian electorate of Cunningham in New South Wales on 19 October 2002.  The by-election was triggered by the resignation of the sitting member, the Australian Labor Party's Stephen Martin on 16 August 2002.  The writ for the by-election was issued on 16 September 2002.

Frederick Holder: Sir Frederick William Holder KCMG (12 May 185023 July 1909) was an Australian politician.  He was Premier of South Australia from June to October 1892 and again from 1899 to 1901.  He was a prominent member of the inaugural Parliament of Australia following Federation in 1901, and was the first Speaker of the Australian House of Representatives.

Wakefield by-election, 1909: A by-election was held for the Australian House of Representatives seat of Wakefield on 28 August 1909.  This was triggered by the death of the Speaker of the House, Sir Frederick Holder.

Edward Corser: Edward Bernard Cresset Corser (1852 – 31 July 1928) was an Australian politician.  Born in Birmingham, England, he was educated at Worcester and migrated to Australia in 1864.  He was a sugar worker and bank officer in Maryborough in Queensland, eventually becoming a businessman.  In 1909, he was elected to the Legislative Assembly of Queensland as the member for Maryborough.  He transferred to federal Parliament, winning the 1915 Wide Bay by-election caused by the resignation of Labor Prime Minister Andrew Fisher; Corser was a member of the Commonwealth Liberal Party.  In 1917, together with the rest of his party, he became a Nationalist.  He held the seat until his death in 1928; he was succeeded in a by-election by his son, Bernard Corser, representing the Country Party.

Darling Downs by-election, 1901: A by-election was held for the Australian House of Representatives electorate of Darling Downs in Queensland on 14 September 1901, a Saturday.  It was triggered by the death of William Henry Groom on 8 August 1901.  It was the first by-election of the Australian parliament since Federation.  The writ for the by-election was issued on 13 August, nominations for candidates closed on 27 August.

North Sligo by-election, 1909: The North Sligo by-election of 1909 was held on 5 August 1909.  The by-election was held due to the death of the incumbent Irish Parliamentary MP, Patrick Aloysius McHugh.  It was won by the Irish Parliamentary candidate Thomas Scanlan, who was unopposed.

South Kilkenny by-election, 1909: The South Kilkenny by-election of 1909 was held on 10 August 1909.  The by-election was held due to the incumbent Irish Parliamentary MP, Nicholas Joseph Murphy, being declared bankrupt.  It was won by the Irish Parliamentary candidate Matthew Keating, being elected unopposed.

Supporting paragraphs: Wakefield by-election, 1909 Frederick Holder
Answer: the inaugural Parliament of Australia