Definition: 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.
Input: Question: What city is the TV station based in that signed on in October 1954? Passage:The history of CBS in East Texas traces back to the sign-on of the market's first television station, KTVE (channel 32) in 1953; that station shut down due to financial problems in 1955. After KLTV (channel 7) signed on in October 1954, it carried select CBS programming as part of a shared primary affiliation with ABC and NBC (eventually becoming a full-time ABC affiliate in 1984). CBS would not have a full-time affiliate in the Tyler-Longview market until September 1984, when KLMG-TV (channel 51, now KFXK-TV) signed on the air from Longview; KLMG disaffiliated from the network in April 1991 to become the market's Fox affiliate. For the thirteen years that followed, viewers in the portion of East Texas that KFXK-TV served had to rely on cable or satellite for CBS programming. Most area cable providers imported ShreveportTexarkana affiliate KSLA, while some cable systems in the western portion of the market carried the network's DallasFort Worth affiliates (KDFW was carried from 1991 until it switched to Fox in July 1995 while affiliate-turned-O&O KTVT was then carried from that point until early 2004); cable systems in Houston County carried KBTX-TV instead.

Output:
After KLTV (channel 7) signed on in October 1954, it carried select CBS programming as part of a shared primary affiliation with ABC and NBC (eventually becoming a full-time ABC affiliate in 1984)