Question: Who fathered the leader of the first expedition to reach Asia by sailing west across the ocean in which a deep water berth can be found on Tuvalu?

full_context: Document 1: Vasco da Gama: Vasco da Gama's father was Estêvão da Gama, who had served in the 1460s as a knight of the household of Infante Ferdinand, Duke of Viseu. He rose in the ranks of the military Order of Santiago. Estêvão da Gama was appointed "alcaide-mór" (civil governor) of Sines in the 1460s, a post he held until 1478; after that he continued as a receiver of taxes and holder of the Order's commendas in the region.
Document 2: Portuguese discovery of the sea route to India: The discovery of the sea route to India is the description sometimes used in Europe and among the Portuguese for the first recorded trip made directly from Europe to India via the Atlantic Ocean. It was undertaken under the command of Portuguese explorer Vasco da Gama during the reign of King Manuel I in 1497 - 1499. Considered by Europe to be one of the most remarkable voyages of the Age of Discovery, it consolidated the Portuguese maritime presence in Indian Ocean and that country's dominance of global trade routes.
Document 3: Vasco da Gama: Vasco da Gama, 1st Count of Vidigueira (Portuguese pronunciation: (ˈvaʃku ðɐ ˈɣɐmɐ); c. 1460s -- 24 December 1524), was a Portuguese explorer and the first European to reach India by sea. His initial voyage to India (1497 -- 1499) was the first to link Europe and Asia by an ocean route, connecting the Atlantic and the Indian oceans and therefore, the West and the Orient.
Document 4: Tuvalu: Funafuti is the only port but there is a deep-water berth in the harbour at Nukufetau. The merchant marine fleet consists of two passenger/cargo ships Nivaga III and Manu Folau. These ships carry cargo and passengers between the main atolls and travel between Suva, Fiji and Funafuti 3 to 4 times a year. The Nivaga III and Manu Folau provide round trip visits to the outer islands every three or four weeks. The Manu Folau is a 50-metre vessel that was a gift from Japan to the people of Tuvalu. In 2015 the United Nations Development Program (UNDP) assisted the government of Tuvalu to acquire MV Talamoana, a 30-metre vessel that will be used to implement Tuvalu's National Adaptation Programme of Action (NAPA) to transport government officials and project personnel to the outer islands. In 2015 the Nivaga III was donated by the government of Japan; it replaced the Nivaga II, which had serviced Tuvalu from 1989.
Document 5: Chronology of European exploration of Asia: 1497 - 1499 The Portuguese Vasco da Gama, accompanied by Nicolau Coelho and Bartolomeu Dias, is the first European to reach India by an all - sea route from Europe.
Document 6: 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 7: Tuvalu: Tuvaluans are well known for their seafaring skills, with the Tuvalu Maritime Training Institute on Amatuku motu (island), Funafuti, providing training to approximately 120 marine cadets each year so that they have the skills necessary for employment as seafarers on merchant shipping. The Tuvalu Overseas Seamen's Union (TOSU) is the only registered trade union in Tuvalu. It represents workers on foreign ships. The Asian Development Bank (ADB) estimates that 800 Tuvaluan men are trained, certified and active as seafarers. The ADB estimates that, at any one time, about 15% of the adult male population works abroad as seafarers. Job opportunities also exist as observers on tuna boats where the role is to monitor compliance with the boat's tuna fishing licence.
Document 8: Chronology of European exploration of Asia: The Portuguese Vasco da Gama, accompanied by Nicolau Coelho and Bartolomeu Dias, is the first European to reach India by an all - sea route from Europe.
Document 9: 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 10: 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 11: Funafuti: Funafuti is an atoll and the capital of the island nation of Tuvalu. It has a population of 6,025 people, making it the country's most populated atoll, with 56.6 percent of Tuvalu's population. It is a narrow sweep of land between 20 and 400 metres (66 and 1,312 feet) wide, encircling a large lagoon (Te Namo) 18 km (11 miles) long and 14 km (9 miles) wide. The average depth in the Funafuti lagoon is about 20 fathoms (36.5 metres or 120 feet). With a surface of 275 square kilometres (106.2 sq mi), it is by far the largest lagoon in Tuvalu. The land area of the 33 islets aggregates to 2.4 square kilometres (0.9 sq mi), less than one percent of the total area of the atoll. Cargo ships can enter Funafuti's lagoon and dock at the port facilities on Fongafale.
Document 12: Antonio Possevino: Recent scholarship has identified Antonio Possevino's family as New Christians admitted to the learned circles of the court of Renaissance Mantua and its Gonzaga dukes. His father was Piedmontese from Asti and moved to Mantua where he joined the guild of goldsmiths. The family name was changed from Cagliano (Caliano) and had three sons, Giovanni Battista, Antonio and Giorgio. His mother nursed her son Antonio in 1533 together with Francesco III Gonzaga, Duke of Mantua.
Document 13: Vasco Joaquim Rocha Vieira: Vasco Joaquim Rocha Vieira, (;b. Lagoa, Portugal, born on 16 August 1939), is a retired Portuguese Army officer who was last Governor of Macau.
Document 14: 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 15: Portuguese India: The first viceroy, Francisco de Almeida, established his headquarters in Cochin (Cochim, Kochi). Subsequent Portuguese governors were not always of viceroy rank. After 1510, the capital of the Portuguese viceroyalty was transferred to Goa. Until the 18th century, the Portuguese governor in Goa had authority over all Portuguese possessions in the Indian Ocean, from southern Africa to southeast Asia. In 1752 Mozambique got its own separate government and in 1844 the Portuguese Government of India stopped administering the territory of Macau, Solor and Timor, and its authority was confined to the colonial holdings on the Malabar coast of present - day India.
ground_truth: Estêvão da Gama
sub_queries: Where is there a deep water berth available on Tuvalu? Answer: Nukufetau
Nukufetau >> located in or next to body of water Answer: Pacific Ocean
who led the first expedition to reach asia by sailing west across Pacific Ocean Answer: Vasco da Gama
Who fathered Vasco da Gama ? Answer: Estêvão da Gama