In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Q: Passage: Colonel Marie Augstin Gaston Cros (known as Gaston Cros) (6 October 1861 – 10 May 1915) was a French army officer and archaeologist. He was born in Alsace and was displaced when that territory was incorporated into the German Empire. He joined the French Army as a lieutenant and saw action in Tonkin before spending several years surveying in Tunisia, receiving the honours of membership of Vietnamese and Tunisian orders and appointment as a chevalier of the Legion of Honour. In 1901 Cros was appointed head of the French archaeological expedition to Girsu, Iraq to continue the work of Ernest de Sarzec. His work over the next five years included the tracing of the thick city wall and for his work there received a letter of commendation from Gaston Doumergue, the Minister of Fine Arts, and the award of the Golden Palms of the Ordre des Palmes Académiques. Promoted to lieutenant-colonel, Cros served in the French protectorate of Morocco from 1913, seeing action in the Zaian War.
 Link Information: Alsace (, , ; ; ; ) is a cultural and historical region in eastern France, Question: What country is Gasaton Cros' birthplace now found?

A: Answer: France
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Q: Passage: Tomić belonged to the first class of six Serbian pilots trained in France in 1912. In August 1914, he participated in the first aerial dogfight of the war, when he exchanged gunfire with an Austro-Hungarian plane over western Serbia. In the winter of 1915, during the Serbian Army's retreat across Albania to the Greek island of Corfu, he evacuated General Petar Bojović from Scutari by plane, delivered mail by air and transported the Serbian Government's gold and hard currency reserves from Niš to keep them from falling into enemy hands. Following the occupation of Serbia by the Central Powers, Tomić went to France and flew over the Western Front, where he had one confirmed kill. He returned to the Balkans in late 1916, conducted combat missions over Bulgarian-occupied Macedonia and shot down one enemy plane. Tomić continued flying after the war and became head of the Royal Yugoslav Air Force's pursuit squadron in Novi Sad. During World War II, he was captured by the Germans and detained as a prisoner of war. Tomić left Yugoslavia following the war and settled in the United States with his wife. He died in Chicago in 1962.
 Link Information: The Central Powers consisted of the German Empire and the Austro-Hungarian Empire at the beginning of the war. The Ottoman Empire joined the Central Powers later in 1914. In 1915, the Kingdom of Bulgaria joined the alliance. Question: How many nations were part of the powers that occupied Serbia?

A: Answer: 4
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Q: Passage: On February 7, 1917 Satō was assigned command of the 2nd Special Task Fleet, a task force of Japanese destroyers deployed to Malta in the Mediterranean as part of Japan’s assistance to the Allied war effort under the Anglo-Japanese Alliance. Sato commanded two squadrons of 17 destroyers from aboard the flagship , patrolling the eastern Mediterranean from Alexandria to Marseilles and from Alexandria to Taranto against the Imperial German Navy and Austro-Hungarian Navy. His forces escorted convoys of merchant vessels and troopships, and performed anti-submarine warfare duties. Future admirals Tamon Yamaguchi and Raizō Tanaka were members of his staff. These operations were under the overall command of Royal Navy Admiral Sir Somerset Gough-Calthorpe, and Rear Admiral George A Ballard, who highly praised Satō in dispatches to London. The Japanese ships were at sea on combat duty on average 25 days or more each month. The Japanese Navy spent 72 percent of their time at sea compared with 60 percent by the British and about 45 percent by the French and Italian Navy.
 Link Information: none Question: How old were Sato's staff that were to become future geneerals when Sato was assigned command of the 2nd Special Task Fleet?

A:
Answer: none
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