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.
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Question: Question: When did the program on which song made its premier first air? Passage:A preview of the video was posted on AOL's PopEater.com, and subsequently on Bieber's VEVO channel, including behind the scenes clips of Bieber with the dancers, and highlights of the video with Usher and in front of a green screen. Bieber said, "It's really awesome to be able to work with professional dancers, you know, people that were in, like, ABDC, and also got an approval from choreographer Jamaica, who said Bieber was "killing it" and that she didn't have to give him any corrections. It made its premiere during the June 17, 2010 results show of the seventh season of So You Think You Can Dance, and was introduced by Usher after his performance of "OMG". It later premiered that night on VEVO and on June 18, 2010 on 20/20at the end of their show. The video features dance crews including, America's Best Dance Crew season 5 winners Poreotics, and Season 3's runner up Beat Freaks, as well as The Syrenz, LXD, Medea Sirkas, solo acts Simrin Player and Bboy Fly, and other dancers and crews. Singer/actress and model Katerina Graham makes a cameo in a scene with Poreotics. Bieber's best friend Ryan Butler, who appeared in the "One Time" video, also appears alongside Bieber, wearing a T-shirt advertising his Twitter account. According to Tamar Antai of MTV News the video "makes vague allusions" to clips for Busta Rhymes' "Pass the Courvoisier, Part II" and Chris Brown's "Wall to Wall". A backpack choreography scene with LXD recalls Usher's 1997 video for "You Make Me Wanna".

Answer: It made its premiere during the June 17, 2010 results show of the seventh season of So You Think You Can Dance, and was introduced by Usher after his performance of "OMG"

Question: Question: Which political officer now serves as the 2nd in line to become president? Passage:McKellar twice served as President pro tempore of the United States Senate, commencing in 1945, the first to hold the position under the system that has prevailed since of reserving it for the most senior member of the majority party. When Harry Truman became president in April 1945, upon FDR's death, the vice presidency became vacant (the mechanism for filling intra-term vacancies had not yet been created by the 25th Amendment), and so McKellar became the permanent presiding officer of the United States Senate. Also, as the President pro tempore of the Senate had, prior to 1886, been second in the presidential line of succession, behind only the vice president, Truman viewed McKellar as the logical wartime replacement for himself, and asked McKellar to attend all Cabinet meetings. In 1947 Truman successfully lobbied Congress to pass a new Presidential Succession Act restoring both the Speaker of the House and the President pro tempore of the Senate to the succession ahead of the Cabinet secretaries. By the time the law came into effect, McKellar was no longer in the position of President pro tempore, because Republicans held the majority in the 80th Congress. Truman vetoed the Taft-Hartley Act in 1947 to restrict labor unions, which McKellar voted in favor of. As such Truman selected Alben Barkley of Kentucky as his running mate in the 1948 presidential election. When Democrats regained control as a result of the 1948 elections, McKellar again became President pro tempore. He was therefore second in line for the presidency (behind the Speaker of the House) from January 3, 1949 until January 20, 1949, when Alben Barkley took office as Vice President of the United States.

Answer: When Harry Truman became president in April 1945, upon FDR's death, the vice presidency became vacant (the mechanism for filling intra-term vacancies had not yet been created by the 25th Amendment), and so McKellar became the permanent presiding officer of the United States Senate

Question: Question: Is the railroad company that backed the creation of the Beech Creek line still operational? Passage:The company was originally chartered as the Susquehanna and South Western Railroad on August 12, 1882. That company's charter called for a line from Williamsport, Pennsylvania to the southern line of Clearfield County. The proposed line was initiated with the backing of the New York Central Railroad, as part of a far-reaching strategy to ensure access to bituminous coal reserves. The New York Central did not itself extend into the bituminous coalfields, making it vulnerable to action both by the coal operators who mined the coal and rivals like the Pennsylvania Railroad, who carried it. The coal operators of Tioga County, Pennsylvania, some of whom already shipped over the New York Central via the Fall Brook Coal Company's railroad system, faced irrepressible labor troubles and the impending exhaustion of their mines. William H. Vanderbilt, president of the New York Central, responded to the challenge by developing a plan to enter the Clearfield Coalfield, hitherto the exclusive preserve of the Pennsylvania Railroad. The Vanderbilts would provide capital to a syndicate of Tioga coal operators and businessmen of the Clearfield area, incorporated as the Clearfield Bituminous Coal Company, who could acquire coal lands without arousing suspicion. The Fall Brook's rail network, extended down Pine Creek by a paper railroad called the Jersey Shore, Pine Creek and Buffalo Railway, would bring the New York Central's trains to Jersey Shore, on the West Branch Susquehanna River to the west of Williamsport. From there, the Susquehanna and South Western would head west by way of Beech Creek and Moshannon Creek to the vicinity of Clearfield.

Answer:
The proposed line was initiated with the backing of the New York Central Railroad, as part of a far-reaching strategy to ensure access to bituminous coal reserves