Question: What is the country in the middle of the ocean, in which is found the atoll that Lafanga is a part of?

full_context: Document 1: Fale, Tuvalu: Fale is an islet of Nukufetau, Tuvalu. The traditional history of Nukufetau recalls that in order to protect the atoll from raiders from Tonga, Lagitupu and Laupapa, two aliki (chiefs) protected Fale. Lagitupu and Laupapa created a trap at a place still called Tututekolo, which was beside a path which led to the beach, where they would surprise the raiders and spear them or split their skulls with an axe made from shells.
Document 2: Motulalo: Motulalo is the largest islet of Nukufetau, Tuvalu. The traditional history of Nukufetau recalls that in order to protect the atoll from raiders from Tonga, Tauasa, an aliki (chief), was given Motulalo. Tauasa would pull up coconut trees and throw them at the raiders.
Document 3: Faiava Lasi: Faiava Lasi is an islet of Nukufetau, Tuvalu, which is immediately to the south of Lafaga islet at the North East of Nukufetau atoll.
Document 4: Niulakita: Niulakita is the southernmost island of Tuvalu, and also the name of the only village on this island. Niulakita has a population of 27 (2012 census). The residents of Niulakita have moved to the island from Niutao. Niulakita is represented in the Parliament of Tuvalu by the members of the constituency of Niutao.
Document 5: Marshall Islands: The Marshall Islands, officially the Republic of the Marshall Islands (Marshallese: Aolepān Aorōkin M̧ajeļ),[note 1] is an island country located near the equator in the Pacific Ocean, slightly west of the International Date Line. Geographically, the country is part of the larger island group of Micronesia. The country's population of 53,158 people (at the 2011 Census) is spread out over 29 coral atolls, comprising 1,156 individual islands and islets. The islands share maritime boundaries with the Federated States of Micronesia to the west, Wake Island to the north,[note 2] Kiribati to the south-east, and Nauru to the south. About 27,797 of the islanders (at the 2011 Census) live on Majuro, which contains the capital.
Document 6: Tokū, Tonga: Tokū is an uninhabited, volcanic island in Tonga. It is located in the very north of Vavaʻu group in the north of the country. It is about long and up to wide, yielding an area of . It is up to above sea level near its east coast.
Document 7: Tokinivae: Tokinivae is an islet of Nui atoll, in the Pacific Ocean state of Tuvalu.< Nui tradition is that Kolaka, a warrior from Nukufetau came on several raiding expeditions to Tokinivae, until he was killed and buried at Tararorae.
Document 8: Lafanga: Lafanga or Lafaga is an islet of Nukufetau, Tuvalu. The traditional history of Nukufetau recalls that in order to protect the atoll from raiders from Tonga, Fialua, an Aliki (chief), was given Lafanga, which is the largest of the eastern islets of Nukufetau. Fialua would attack raiders with his club and bury the bodies at a place called Temata.
Document 9: Hawaiian Islands: The Hawaiian Islands (Hawaiian: Mokupuni o Hawai'i) are an archipelago of eight major islands, several atolls, numerous smaller islets, and seamounts in the North Pacific Ocean, extending some 1,500 miles (2,400 kilometers) from the island of Hawai ʻi in the south to northernmost Kure Atoll. Formerly the group was known to Europeans and Americans as the ``Sandwich Islands '', a name chosen by James Cook in honor of the then First Lord of the Admiralty John Montagu, 4th Earl of Sandwich. The contemporary name is derived from the name of the largest island, Hawaii Island.
Document 10: Temotufoliki: Te Motu Foliki is an islet of Nanumea atoll, Tuvalu. It is a small uninhabited islet, which Nanumean traditions describe as being formed when sand spilled from the baskets of two women, Pai and Vau, when they were forced off Nanumea by Tefolaha, the Tongan warrior who became the ancestor of the people of Nanumea.
Document 11: Marshall Islands: The islands are located about halfway between Hawaii and Australia, north of Nauru and Kiribati, east of the Federated States of Micronesia, and south of the U.S. territory of Wake Island, to which it lays claim. The atolls and islands form two groups: the Ratak (sunrise) and the Ralik (sunset). The two island chains lie approximately parallel to one another, running northwest to southeast, comprising about 750,000 square miles (1,900,000 km2) of ocean but only about 70 square miles (180 km2) of land mass. Each includes 15 to 18 islands and atolls. The country consists of a total of 29 atolls and five isolated islands.
Document 12: Polynesia: Polynesia (UK: / ˌpɒlɪˈniːziə /, US: / - ʒə /; from Greek: πολύς polys ``many ''and Greek: νῆσος nēsos`` island'') is a subregion of Oceania, made up of more than 1,000 islands scattered over the central and southern Pacific Ocean. The indigenous people who inhabit the islands of Polynesia are termed Polynesians, and share many similar traits including language family, culture, and beliefs. Historically, they had a strong tradition of sailing and using stars to navigate at night. The largest country in Polynesia is New Zealand.
Document 13: Lefogaki: Lafogaki is an islet of Nanumea atoll, Tuvalu. It is a small uninhabited islet, which Nanumean traditions describe as being formed when sand spilled from the baskets of two women, Pai and Vau, when they were forced off Nanumea by Tefolaha, the Tongan warrior who became the ancestor of the people of Nanumea.
Document 14: Tuvalu: An important creation myth of the islands of Tuvalu is the story of the te Pusi mo te Ali (the Eel and the Flounder) who created the islands of Tuvalu; te Ali (the flounder) is believed to be the origin of the flat atolls of Tuvalu and the te Pusin (the Eel) is the model for the coconut palms that are important in the lives of Tuvaluans. The stories as to the ancestors of the Tuvaluans vary from island to island. On Niutao, Funafuti and Vaitupu the founding ancestor is described as being from Samoa; whereas on Nanumea the founding ancestor is described as being from Tonga.
Document 15: Pacific Ocean: This ocean has most of the islands in the world. There are about 25,000 islands in the Pacific Ocean. The islands entirely within the Pacific Ocean can be divided into three main groups known as Micronesia, Melanesia and Polynesia. Micronesia, which lies north of the equator and west of the International Date Line, includes the Mariana Islands in the northwest, the Caroline Islands in the center, the Marshall Islands to the west and the islands of Kiribati in the southeast.
ground_truth: Caroline Islands
sub_queries: Lafanga >> part of Answer: Nukufetau
Nukufetau >> located in or next to body of water Answer: Pacific Ocean
country in the middle of Pacific Ocean Answer: Caroline Islands