Question: Gabriel Gustafson was in charge of the excavation of what well preserved Viking ship?

full_context: Document 1: Tune ship: The Tune ship ("Tuneskipet") is a Viking ship exhibited in the Viking Ship Museum ("Vikingskipshuset på Bygdøy") in Bygdøy, Oslo.
Document 2: Vasa Museum: The Vasa Museum (Swedish: "Vasamuseet" ) is a maritime museum in Stockholm, Sweden. Located on the island of Djurgården, the museum displays the only almost fully intact 17th century ship that has ever been salvaged, the 64-gun warship "Vasa" that sank on her maiden voyage in 1628. The Vasa Museum opened in 1990 and, according to the official web site, is the most visited museum in Scandinavia. Together with other museums, such as the Stockholm Maritime Museum, the museum belongs to the Swedish National Maritime Museums (SNMM).
Document 3: Treenailed boat: The treenailed boat is a boat model used in Northern Europe, usually associated with Vikings but should perhaps be ascribed to Pomeranian groups. The shape and construction coincides with the sewn boats, but instead of ropes, it is assembled with wooden treenails.
Document 4: Viking (ship): Viking is a Viking ship replica. It is an exact replica of the Gokstad ship recovered from Gokstadhaugen, a Viking Era burial mound near Sandefjord, Norway in 1880. The "Viking" was featured at the World's Columbian Exposition at Chicago in 1893.
Document 5: Alvøy: Alvøyna or Alvøy is an island in Øygarden municipality in Hordaland county, Norway. The 12 km2 island is located west of the Hjeltefjorden and it had a population of 760 inhabitants in 2001. It sits just north of the island of Ona and just south of the island of Seløyna. The Sture Terminal, endpoint of the Oseberg Transport System, was established here in 1988. The village of Alveim is located on the west side of the island and the village of Tjeldstø lies on the eastern shore.
Document 6: Gokstad ship: The Gokstad ship is a 9th-century Viking ship found in a burial mound at Gokstad in Sandar, Sandefjord, Vestfold, Norway. It is currently on display at the Viking Ship Museum in Oslo, Norway.
Document 7: Vigra: Vigra is a former municipality in Møre og Romsdal county on the west coast of Norway. It is located in the present-day Giske Municipality. The former municipality was made up of the island of Vigra along with many smaller islets surrounding it. The municipality existed from 1890 until 1964 when it was merged into Giske Municipality. The administrative centre of the municipality was the village of Roald, and Vigra Church was the main church for the municipality.
Document 8: Havhingsten fra Glendalough: Havhingsten fra Glendalough ("The Sea Stallion from Glendalough" or just "Sea Stallion") is a reconstruction of "Skuldelev 2", one of the Skuldelev ships and the second-largest Viking longship ever to be found. The original vessel was built in the vicinity of Dublin around 1042, using oak from Glendalough in County Wicklow, Ireland, hence the ship's name. The reconstruction was built in Denmark at the shipyard of the Viking Ship Museum in Roskilde between 2000 and 2004 and is used for historical research purposes.
Document 9: Viking ship replica: Viking ship replicas are one of the more common types of ship replica. "Viking", the very first Viking ship replica, was built by the Rødsverven shipyard in Sandefjord, Norway. In 1893 it sailed across the Atlantic Ocean to Chicago in the United States for the World's Columbian Exposition. Formerly located in Lincoln Park, Chicago, Illinois, the "Viking" is currently undergoing conservation in Geneva, Illinois, United States.
Document 10: Gustaf Dalén: Nils Gustaf Dalén (30 November 1869 – 9 December 1937) was a Swedish Nobel Laureate and industrialist, the founder of the AGA company and inventor of the AGA cooker and the Dalén light. In 1912 he was awarded the Nobel Prize in Physics for his "invention of automatic regulators for use in conjunction with gas accumulators for illuminating lighthouses and buoys".
Document 11: Hjemkomst Center: The Heritage Hjemkomst Interpretive Center, commonly known as the Hjemkomst Center, is a museum in Moorhead, Minnesota. Hjemkomst Center first opened in 1985 and serves as a home to "Hjemkomst" Viking Ship, Hopperstad Stave Church replica, quarterly museum exhibits, and county archives. In 2009, the Clay County Historical Society (which was founded in 1932) and the Heritage Hjemkomst Interpretive Center merged to form the Historical and Cultural Society of Clay County.
Document 12: Randlev and Hesselbjerg: The archaeological sites Randlev and Hesselbjerg refer to two closely related excavations done throughout the 20th century near the village of Randlev in the Odder Municipality of Denmark, three kilometers southeast of the town of Odder. Randlev is known primarily for its Romanesque church constructed sometime around 1100 A.D. Hesselbjerg refers to the large Viking-Age cemetery discovered on the Hesselbjerg family farm and the site Randlev refers to the nearby settlement from the same period. Although both Randlev and Hesselbjerg were contemporaneous and encompass a similar area, Hesselbjerg refers more specifically to the 104 graves discovered prior to the later excavation at the site Randlev, which pertains to the Viking Age (approximately 850 A.D. – 1050 A.D.) settlement. The settlement consisted of a farm complex that was likely active during the ninth and tenth centuries; finds from the site such as silver hoards and elaborate jewelry indicate that the farm was likely prosperous, a conjecture which is supported by the extremely fertile land surrounding the area. Artifacts were found in the vicinity of the Hesselbjerg and Randlev sites as early as 1932 when a local farmer discovered a silver hoard, but serious excavations were not conducted until 1963. These excavations ended in 1970; however, Moesgård Museum returned to the site in 1997 and continued analysis until 2010.
Document 13: Vestfold: Vestfold ] is a county in Norway, bordering Buskerud and Telemark. The county administration is in Tønsberg, and the largest city is Sandefjord. With the exception of Oslo county, Vestfold is the smallest county in Norway by area.
Document 14: Gabriel Gustafson: Gabriel Adolf Gustafson (8August 185316April 1915) was a Swedish-Norwegian archaeologist. He was responsible for the excavation and conservation of the Oseberg Ship ("Osebergfunnet") .
Document 15: Oseberg Ship: The Oseberg ship (Norwegian: "Osebergskipet") is a well-preserved Viking ship discovered in a large burial mound at the Oseberg farm near Tønsberg in Vestfold county, Norway. This ship is commonly acknowledged to be among the finer artifacts to have survived from the Viking Era. The ship and some of its contents are displayed at the Viking Ship Museum at Bygdøy on the western side of Oslo, Norway.
ground_truth: Oseberg Ship