Question: On what continent is the country where the Royal Palace is located?

full_context: Document 1: Foa: Foa is an island in Tonga. It is located within the Haapai group in the centre of the country, to northeast of the national capital of Nukualofa.
Document 2: Tonga: Tonga's foreign policy has been described by Matangi Tonga as "Look East"—specifically, as establishing closer diplomatic and economic relations with Asia (which actually lies to the north-west of the Pacific kingdom). Tonga retains cordial relations with the United States. Although it remains on good terms with the United Kingdom, the two countries do not maintain particularly close relations, and the United Kingdom closed its High Commission in Tonga in 2006. Tonga's relations with Oceania's regional powers, Australia and New Zealand, are good.
Document 3: Near East: The Foreign and Commonwealth Office of United Kingdom recognises a Middle East and North Africa region, but not a Near East. Their original Middle East consumed the Near East as far as the Red Sea, ceded India to the Asia and Oceania region, and went into partnership with North Africa as far as the Atlantic.
Document 4: Kiribati: Kiribati maintains close relations with its Pacific neighbours, Australia, New Zealand, Republic of China (Taiwan), Japan and Fiji. The first three of these provide the majority of the country's foreign aid. Taiwan and Japan also have specified-period licences to fish in Kiribati's waters. There are four resident diplomatic missions headquartered in Kiribati: the Embassies of the Republic of China (Taiwan) and Cuba and the High Commissions of Australia and New Zealand.
Document 5: Tonga: The US Exploring Expedition visited in 1840.In 1845, the ambitious young warrior, strategist, and orator Tāufaʻāhau united Tonga into a kingdom. He held the chiefly title of Tuʻi Kanokupolu, but had been baptised by Methodist missionaries with the name Siaosi ("George") in 1831. In 1875, with the help of missionary Shirley Waldemar Baker, he declared Tonga a constitutional monarchy; formally adopted the western royal style; emancipated the "serfs"; enshrined a code of law, land tenure, and freedom of the press; and limited the power of the chiefs.
Document 6: Royal Palace, Tonga: The Royal Palace of the Kingdom of Tonga is located in the northwest of the capital, Nukualofa, close to the Pacific Ocean. The wooden Palace, which was built in 1867, is the official residence of the King of Tonga. Although the Palace is not open to the public, it is easily visible from the waterfront.
Document 7: Kolonga: Kolonga is a village and the most populated settlement located on the northeast coast of Tongatapu in the Hahake District, Kingdom of Tonga. Kolonga is a hereditary estate of Hon. Lord Nuku.
Document 8: Malapo: Malapo is a small village in the eastern district of Tongatapu in the kingdom of Tonga. It is located in the fork of the road junction, where the main road to Nukualofa splits into the road to Mua and beyond and the road to the airport near Fuaamotu. It is near to the neighbouring village of Holonga.
Document 9: Assistant Secretary of State for East Asian and Pacific Affairs: The Assistant Secretary of State for East Asian and Pacific Affairs is the head of the Bureau of East Asian and Pacific Affairs within the United States Department of State. The Assistant Secretary guides operation of the U.S. diplomatic establishment in the countries of the Asia - Pacific region and advises the Secretary of State and the Under Secretary for Political Affairs on matters relating to the area. The last permanent Assistant Secretary was Daniel R. Russel, who left on March 8, 2017. Susan Thornton is now Acting Assistant Secretary.
Document 10: Royal Palace, Porto-Novo: The Royal Palace, also known as King Toffa's Palace and more recently Musée Honmé, is a former royal residence and today museum in Porto-Novo, Benin. It contains an example of an Alounloun and most displays are related to the King Toffa period. The palace and the surrounding district was added to the UNESCO World Heritage Tentative List on October 31, 1996 in the Cultural category.
Document 11: Royal Hawaiian Hotel: The Royal Hawaiian Hotel is a beachfront luxury hotel located in Waikiki in Honolulu, Hawaii, on the island of Oahu. One of the first hotels established in Waikiki, the Royal Hawaiian is considered one of the most luxurious and famous hotels in Hawaiian tourism, and in its 90-year history has been host to numerous celebrities and world dignitaries. The bright pink hue of its concrete stucco façade with its Spanish/Moorish styled architecture and prominent location on the wide sandy beach have earned it the alliterative nickname of "The Pink Palace of the Pacific".
Document 12: Tuvalu: Tuvalu participates in the work of Secretariat of the Pacific Community, or SPC (sometimes Pacific Community) and is a member of the Pacific Islands Forum, the Commonwealth of Nations and the United Nations. Tuvalu has maintained a mission at the United Nations in New York City since 2000. Tuvalu is a member of the World Bank and the Asian Development Bank. On 18 February 2016 Tuvalu signed the Pacific Islands Development Forum Charter and formally joined the Pacific Islands Development Forum (PIDF).
Document 13: China–United States relations: Relations with China began under George Washington, leading to the 1845 Treaty of Wangxia. The United States was allied to the Republic of China during the Pacific War, but broke off relations with China for 25 years when the communist government took over, until Richard Nixon's 1972 visit to China. Since Nixon, every successive U.S. president has toured China. Relations between the two countries have generally been stable with some periods of open conflict, most notably during the Korean War and the Vietnam War. Currently, China and the United States have mutual political, economic, and security interests, including but not limited to the proliferation of nuclear weapons, although there are unresolved concerns relating to the role of democracy in the government in China and human rights in both respective countries. Relations with China have strained under Barack Obama's Asia pivot strategy, ongoing maritime disputes in the South China Sea, and a trade war in 2018.
Document 14: Pacific War: The official policy of the U.S. Government is that Thailand was not an ally of the Axis, and that the United States was not at war with Thailand. The policy of the U.S. Government ever since 1945 has been to treat Thailand not as a former enemy, but rather as a country which had been forced into certain actions by Japanese blackmail, before being occupied by Japanese troops. Thailand has been treated by the United States in the same way as such other Axis-occupied countries as Belgium, Czechoslovakia, Denmark, Greece, Norway, Poland, and the Netherlands.
Document 15: Oceania: Biogeographically, as a synonym for the Australasian ecozone and the Pacific ecozone (Melanesia, Polynesia, and Micronesia), with New Zealand forming the south - western corner of the Polynesian Triangle. To note, New Zealand may also be considered part of Australasia, despite being traditionally part of Polynesia. As an ecozone, Oceania includes all of Micronesia, Fiji, and all of Polynesia except New Zealand. New Zealand, along with New Guinea and nearby islands, part of the Philippine islands, Australia, the Solomon Islands, Vanuatu, and New Caledonia, constitute the separate Australasian ecozone. In the geopolitical conception used by the United Nations, International Olympic Committee, and many atlases, Oceania includes Australia and the nations of the Pacific from Papua New Guinea east, but not Indonesian New Guinea.
ground_truth: Oceania
sub_queries: Royal Palace >> country Answer: Tonga
On what continent can Tonga be found? Answer: Oceania