Question: Who was the ninth governor-general in the country containing Buka?

full_context: Document 1: Bagana: Bagana is an active volcano located in the centre of the island of Bougainville, Papua New Guinea, the largest island of the Solomon group. It is the most active volcano in the country, occupying a remote portion of central Bougainville Island. It is one of Melanesia's youngest and most active volcanoes.
Document 2: History of Papua New Guinea: Elections in 1972 resulted in the formation of a ministry headed by Chief Minister Michael Somare, who pledged to lead the country to self - government and then to independence. Papua New Guinea became self - governing on 1 December 1973 and achieved independence on 16 September 1975. The country joined the United Nations (UN) on 10 October 1975 by way of Security Council Resolution 375 and General Assembly resolution 3368. The 1977 national elections confirmed Michael Somare as Prime Minister at the head of a coalition led by the Pangu Party. However, his government lost a vote of confidence in 1980 and was replaced by a new cabinet headed by Sir Julius Chan as prime minister. The 1982 elections increased Pangu's plurality, and parliament again chose Somare as prime minister. In November 1985, the Somare government lost another vote of no confidence, and the parliamentary majority elected Paias Wingti, at the head of a five - party coalition, as prime minister. A coalition, headed by Wingti, was victorious in very close elections in July 1987. In July 1988, a no - confidence vote toppled Wingti and brought to power Rabbie Namaliu, who a few weeks earlier had replaced Somare as leader of the Pangu Party.
Document 3: Michael Ogio: Sir Michael Ogio  (7 July 1942 – 18 February 2017) was a Papua New Guinean politician who led People's Democratic Movement party. He served as the ninth Governor-General of Papua New Guinea.
Document 4: Mauro Poggia: Formerly a member of the Christian Democratic People's Party (CVP), Poggia left to join the MCG in 2009. He was elected to the Grand Council of Geneva at the 2009 election. He was elected as the MCG's sole member of the National Council at the 2011 election, representing Geneva.
Document 5: Prime Minister of Papua New Guinea: Prime Minister of Papua New Guinea Emblem of Papua New Guinea Incumbent Peter O'Neill since 3 August 2012 Appointer Bob Dadae Governor - General of Papua New Guinea Term length At the Governor - General's pleasure Inaugural holder Michael Somare Formation 16 September 1975
Document 6: Rabaul Airport: Rabaul Airport, also called Tokua Airport, is an airport serving Kokopo and Rabaul, the current and former capitals of East New Britain Province on New Britain island in Papua New Guinea.
Document 7: Beriota: Beriota is a village on the south-eastern coast of New Ireland, Papua New Guinea. It lies to the north-east of Bakop. There is coral in the area.
Document 8: Buka, Papua New Guinea: Buka is located on the southern coast of Buka Island, in the Autonomous Region of Bougainville, in eastern Papua New Guinea (country).
Document 9: List of Mills government ministers: This is a listing of the ministers who served in the National Democratic Congress government of John Atta Mills in Ghana starting from 7 January 2009. The Mills presidency ended on 24 July 2012 when President John Atta Mills died. Mills was succeeded by his vice president, John Dramani Mahama.
Document 10: Arawa, Papua New Guinea: Arawa was the capital and largest town in the Autonomous Region of Bougainville in Papua New Guinea. It was largely destroyed during the Bougainville Civil War, resulting in the relocation of the capital to Buka, though there are plans to rebuild Arawa and make it the capital again. The land where Arawa is now situated was previously a large expatriate plantation.
Document 11: Gasmata: Gasmata is a village on the southern coast of New Britain, Papua New Guinea located at 6° 16' 60S 150° 19' 60E. There is a Gasmata Airport in Surumi Peninsula area adjacent.
Document 12: Palabong: Palabong is a village on the south-west coast of New Ireland, Papua New Guinea. It is located to the southeast of Umudu.
Document 13: Trobriand Islands: The Trobriand Islands are a 450-square-kilometre (174-square-mile) archipelago of coral atolls off the east coast of New Guinea. They are part of the nation of Papua New Guinea and are in Milne Bay Province. Most of the population of 12,000 indigenous inhabitants live on the main island of Kiriwina, which is also the location of the government station, Losuia.
Document 14: Solomon Islands: On 13 December 2007, Prime Minister Manasseh Sogavare was toppled by a vote of no confidence in Parliament, following the defection of five ministers to the opposition. It was the first time a prime minister had lost office in this way in Solomon Islands. On 20 December, Parliament elected the opposition's candidate (and former Minister for Education) Derek Sikua as Prime Minister, in a vote of 32 to 15.
Document 15: Michael Ogio: He became acting governor-general on 20 December 2010 when Jeffrey Nape resigned after one week without explanation. He was elected as Governor-General in his own right on 14 January 2011 when he defeated Pato Kakeraya 65-23. He was sworn in on 25 February 2011.On 26 April 2011, Queen Elizabeth II conferred the honour of knighthood and invested him as Knight Grand Cross of the Most Distinguished Order of St Michael and St George on his appointment as Governor-General of Papua New Guinea at Windsor Castle.Ogio died on 18 February 2017 in Port Moresby, at the age 74.
ground_truth: Sir Michael Ogio
sub_queries: Buka >> country Answer: Papua New Guinea
Who was the ninth governor-general in Papua New Guinea ? Answer: Sir Michael Ogio