In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it. Your job is to determine which sentence(s) from the passage can be used to search for further information needed to answer the question.

Ex Input:
Question: Who was the Emperor of the Byzantine Empire when Mehmed became Sultan for the first time? Passage:This is a list of campaigns personally led by Mehmed II or Sultan Mehmed the Conqueror (30 March 1432 3 May 1481) (Ottoman Turkish: , Mehmed-i sani; Turkish: II. Mehmet; also known as el-Fatih, , "the Conqueror" in Ottoman Turkish; in modern Turkish, Fatih Sultan Mehmet; also called Mahomet II in early modern Europe) was Sultan of the Ottoman Empire twice, first for a short time from 1444 to September 1446, and later from February 1451 to 1481. At the age of 21, he conquered Constantinople and brought an end to the Byzantine Empire, transforming the Ottoman state into an empire. Mehmed continued his conquests in Asia, with the Anatolian reunification, and in Europe, as far as Bosnia and Croatia. Mehmed II is regarded as a national hero in Turkey, and Istanbul's Fatih Sultan Mehmet Bridge is named after him.

Ex Output:
Mehmet; also known as el-Fatih, , "the Conqueror" in Ottoman Turkish; in modern Turkish, Fatih Sultan Mehmet; also called Mahomet II in early modern Europe) was Sultan of the Ottoman Empire twice, first for a short time from 1444 to September 1446, and later from February 1451 to 1481

Ex Input:
Question: When did the war begin that prompted the Navy to build the airport? Passage:In 1950, Admiral Arthur W. Radford, Commander-in-Chief of the United States Pacific Fleet, envisioned an naval base in the Western Pacific to enhance Seventh Fleet capabilities. The Korean War began and the Navy realized it had a need for an air station in the region. Cubi Point in the Philippines was selected, and civilian contractors were initially approached for the project. After seeing the Zambales Mountains and the surrounding jungle, they claimed it could not be done. The U.S. Navy then turned to the Seabees and was told no problem, Can do. The first Seabees to arrive were surveyors of Construction Battalion Detachment 1802. Moblie Comstruction Battalion 3 arrived on 2 October 1951 to get the project going and was joined by MCB 5 in November. Over the next five years, MCBs 2, 7, 9, 11 and CBD 1803 also contributed to the effort. They leveled a mountain to make way for a nearly runway. NAS Cubi Point turned out to be one of the largest earth-moving projects in the world, equivalent to the construction of the Panama Canal. Seabees there moved of dry fill plus another 15 million that was hydraulic fill. The $100million facility was commissioned on 25 July 1956, and comprised an air station with an adjacent pier capable of docking the Navy's largest carriers. Adjusted-for-inflation, today's price-tag for what the Seabees built at Cubi Point would be $906,871,323.53. After decades of use by American forces, Mount Pinatubo erupted in 1991, burying Cubi Point in 18-36 inches of ash. Despite this, the American government wished to keep the Subic Naval Base and signed a treaty with the Philippine government. The treaty was not ratified, however, failing by a slim margin in the Philippine Senate. Attempts to negotiate a new treaty were soon abandoned and the United States was informed that it was to withdraw within one year. U.S. forces withdrew in November 1992, turning over the facility with its airport to the Philippine government.

Ex Output:
The Korean War began and the Navy realized it had a need for an air station in the region

Ex Input:
Question: What year did Barker and Corbett appear on The Frost Report? Passage:Ronnie Barker and Ronnie Corbett met in 1963 at the Buckstone Club in the Haymarket, London, where Corbett was serving drinks between acting jobs. At the time, Barker was beginning to establish himself as a character actor in the West End and on radio. They were invited by David Frost to appear in his new show, The Frost Report, with John Cleese, but the pair's big break came when they filled in, unprepared and unscripted, for eleven minutes during a technical hitch at a British Academy of Film and Television Arts awards ceremony at the London Palladium in 1970. In the audience was Bill Cotton, the Head of Light Entertainment for the BBC, and Sir Paul Fox, the Controller of BBC1. Cotton was so impressed by the duo that he turned to Fox and asked: "How would you like those two on your network?" Unbeknownst to them the pair had just had the renewal of their contract declined by London Weekend Television of rival network ITV, and so were free to change channels. Barker and Corbett were given their own show by the BBC.

Ex Output:
They were invited by David Frost to appear in his new show, The Frost Report, with John Cleese, but the pair's big break came when they filled in, unprepared and unscripted, for eleven minutes during a technical hitch at a British Academy of Film and Television Arts awards ceremony at the London Palladium in 1970