instruction:
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'.
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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?
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Answer: 4


question:
Passage: On January 28, 2015, it was announced that the film would be directed by Stephen Gaghan, replacing Lee, and it would be shot in June 2015 in New York City, New Mexico and Thailand, while the film's foreign sales would be handled by Sierra/Affinity. Producers would be Schwarzman and Nozik, along with Massett, Zinman and McConaughey, while Haggis would executive-produce along with Richard Middleton. On February 12, 2015, Sierra/Affinity sold the film to international distributors at European Film Market in Berlin. Édgar Ramírez was added to the cast on March 18, 2015, to play the role of geologist Michael Acosta. On March 30, 2015, The Weinstein Company acquired the film's US distribution rights for $15 million, and the film would release domestically through company's TWC-Dimension label. On May 15, 2015, Michelle Williams was set to star alongside McConaughey, to play his character's wife. Joshua Harto signed-on on June 3, 2015, to play Lloyd Stanton, the businessman's bank account manager. Timothy Simons was added to the cast on June 12, 2015, to play a Wall Street banker who is coaxed by the duo to inspect the potential value of the company in the jungles of Borneo. Michael Landes also signed-on on June 29, 2015, to star in the film. On August 28, 2015, Bryce Dallas Howard was confirmed to cast in the film for the female lead role of Kay, Wells' longtime girlfriend, replacing Michelle Williams. The other cast added included Corey Stoll, Toby Kebbell, Bruce Greenwood, and Stacy Keach. Daniel Pemberton composed the film's score.
 Link Information: On August 28, 2015, Bryce Dallas Howard was confirmed to cast in the film for the female lead role of Kay, Wells' longtime girlfriend, replacing Michelle Williams. Question: Which of the two actresses who were scheduled to star opposite McConaughey in Gold (2016) is older?
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Answer: Michelle Williams


question:
Passage: In 1980, Stevens joined the Army under their split option training program and conducted basic training at Fort Dix, New Jersey and advanced individual training at Fort Sam Houston, Texas. While engaged in his military service, Stevens entered the University of Southern Maine in the Computer Science program in 1981. However, an enthusiastic professor (John Ricci) converted him to the study of Chemistry. He spent two summers working as an intern at the Brookhaven National Laboratory in Long Island with Professor Ricci, and Drs. Thomas Koetzle and Dick McMullan, where he first learned how to determine the molecular structure of compounds by X-ray and neutron diffraction. While there he also met a University of Southern California research team led by Dr. Robert Bau; after he obtained a Bachelor of Science degree in Chemistry at USM, he entered the University of Southern California in pursuit of a Doctor of Philosophy degree in Chemistry working with Professor Robert Bau and Nobel Laureate Professor, George Olah. He completed his Ph.D. in 26 months, graduating in 1988.
 Link Information: . For this research, Olah was awarded a Nobel Prize in Chemistry in 1994 " Question: In what year did Stevens' professor receive a Nobel Prize?
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Answer: 1994