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.

Example Input: Question: In what year did Porter handle the sound duties for Ann-Margret? Passage:In December 1969, Presley called Porter to ask him to fix the sound for him in the main showroom at the International Hotel (renamed the Las Vegas Hilton two years later); he said he could not hear himself the last time he sang there, and a new run was scheduled for January. Porter went to see Presley's first rehearsal there, and found three stage monitors hanging high above the stage, with only one working. The hotel's engineers did not get the other two to work, so Porter had some of his own Shure Vocal Master loudspeakers brought over from the recording studio. He laid the column loudspeakers on their sides at the front lip of the stage and propped them up to aim at Presley, who was very happy with the result. Presley insisted upon having Porter mix his live show in January even though he was a recording engineer with no previous experience in live sound. Porter quickly learned about acoustic feedback during the first song, but backstage after the show, film stars and musical artists kept complimenting Presley, telling him that Porter's concert sound was "just like the album". Porter mixed Presley's live concerts from then on. Presley paid Porter well for a touring sound engineer; a 1974 contract for nearly two weeks of touring during SeptemberOctober netted Porter $2,600, an amount equivalent to $ in current value. Porter recorded several of these shows in the mid-1970s, released as albums, and witnessed firsthand Presley's physical decline from drug abuse. In 1975, Presley's doctors advised him to exercise more, so he had a racquetball court built at his mansion Graceland. Porter designed and supervised the installation of a powerful high-fidelity Electro-Voice loudspeaker sound system for the racquetball court and an adjoining lounge. On tour, Porter specified the best-sounding, most roadworthy equipment that existed: he used a Midas PRO4 mixing console and UREI equalizers. The tour was supported by Clair Brothers, who supplied all the audio gear and a monitor engineer, Bruce Jackson, who designed a powerful stage monitor system for Presley's show. In August 1977, Porter was changing planes in Boston to fly to Portland, Maine, to mix a Presley concert when he received a phone call informing him that the singer had died. He attended Presley's heavily guarded funeral ceremony at Graceland. Between Presley appearances, Porter also handled sound duties for Ann-Margret in Las Vegas and on the road, under the business name Captain Audio Productions. He consulted on television specials for Ann-Margret and for Bob Hope in 19721973.

Example Output: Between Presley appearances, Porter also handled sound duties for Ann-Margret in Las Vegas and on the road, under the business name Captain Audio Productions

Example Input: Question: In which country did Trousdell attend school as an officer? Passage:He was Commanding Officer of 1Bn Royal Irish Rangers from February 1989 to August 1991. He attended the Higher Command and Staff Course, graduating in April 1991, and was promoted to colonel on 30 June 1991. From August 1991 to January 1992, he was based in Northern Ireland, overseeing the amalgamation of the Ulster Defence Regiment and the Royal Irish Rangers into the Royal Irish Regiment. He was promoted to brigadier on 31 December 1991, with seniority from 30 June 1991. From January 1992 to November 1993, he was commanding officer of the 48 Gurkha Brigade in Hong Kong. He was posted to the Ministry of Defence from November 1993 until January 1997 as Director of Public Relations (Army).

Example Output: He attended the Higher Command and Staff Course, graduating in April 1991, and was promoted to colonel on 30 June 1991

Example Input: Question: How old was Boleslaus II of Bohemia when he had to withdraw from Albrechtsburg after Eckard's forced prevailed? Passage:In 985 Otto III appointed him to succeed Margrave Rikdag in Meissen, following severe Saxon setbacks against the Slavic Lutici tribes during the Great Slav Rising. Eckard remained a vital support for the king and his mother Empress Theophanu. His military responsibilities consisted primarily of securing the Milceni lands as well as the containment of the neighbouring Polish and Bohemia duchies. Duke Boleslaus II of Bohemia had allied with Duke Henry and had taken the occasion to occupy the Albrechtsburg residence, he nevertheless had to withdraw by 987, after Eckard's forces had prevailed. According to the chronicles of Thietmar of Merseburg, he was later elected Duke of Thuringia by the magnates of the region, an event which has been taken as evidence of the principle of tribal ducal election.

Example Output:
Duke Boleslaus II of Bohemia had allied with Duke Henry and had taken the occasion to occupy the Albrechtsburg residence, he nevertheless had to withdraw by 987, after Eckard's forces had prevailed