input question: Extract the answer to the question from the following context. Question: Who was the leader of Prussia at the time? Context: The Treaty of Hubertusburg, between Austria, Prussia, and Saxony, was signed on February 15, 1763, at a hunting lodge between Dresden and Leipzig. Negotiations had started there on December 31, 1762. Frederick, who had considered ceding East Prussia to Russia if Peter III helped him secure Saxony, finally insisted on excluding Russia (in fact, no longer a belligerent) from the negotiations. At the same time, he refused to evacuate Saxony until its elector had renounced any claim to reparation. The Austrians wanted at least to retain Glatz, which they had in fact reconquered, but Frederick would not allow it. The treaty simply restored the status quo of 1748, with Silesia and Glatz reverting to Frederick and Saxony to its own elector. The only concession that Prussia made to Austria was to consent to the election of Archduke Joseph as Holy Roman emperor.???
output answer: Frederick

input question: Extract the answer to the question from the following context. Question: Which trains can you take to travel to Boston from Union Station? Context: Union Station is further served by four Amtrak lines: the Northeast Regional and the high-speed Acela Express provide service to New York, Washington, D.C. and Boston, and rank as the first and second busiest routes in the country; the New Haven–Springfield Line provides service to Hartford and Springfield, Massachusetts; and the Vermonter provides service to both Washington, D.C., and Vermont, 15 miles (24 km) from the Canadian border. Amtrak also codeshares with United Airlines for travel to any airport serviced by United Airlines, via Newark Airport (EWR) originating from or terminating at Union Station, (IATA: ZVE).???
output answer: the Northeast Regional and the high-speed Acela Express

input question: Extract the answer to the question from the following context. Question: Who made the system? Context: The BeiDou Navigation Satellite System (BDS, simplified Chinese: 北斗卫星导航系统; traditional Chinese: 北斗衛星導航系統; pinyin: Běidǒu wèixīng dǎoháng xìtǒng) is a Chinese satellite navigation system. It consists of two separate satellite constellations – a limited test system that has been operating since 2000, and a full-scale global navigation system that is currently under construction.???
output answer: BeiDou

input question: Extract the answer to the question from the following context. Question: In what year did Athanasius cease to be bishop of Alexandria? Context: Saint Athanasius of Alexandria (/ˌæθəˈneɪʃəs/; Greek: Ἀθανάσιος Ἀλεξανδρείας, Athanásios Alexandrías; c. 296–298 – 2 May 373), also called Athanasius the Great, Athanasius the Confessor or, primarily in the Coptic Orthodox Church, Athanasius the Apostolic, was the twentieth bishop of Alexandria (as Athanasius I). His episcopate lasted 45 years (c. 8 June 328 – 2 May 373), of which over 17 were spent in five exiles ordered by four different Roman emperors. Athanasius is a renowned Christian theologian, a Church Father, the chief defender of Trinitarianism against Arianism, and a noted Egyptian leader of the fourth century.???
output answer:
373