You will be given a context, a subject and a relation. Your task is to generate a question based on the subject and relation. The generated question should include the given subject. Try to use a minimum number of words that are not present in either context, subject or relation while generating question.
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Question: Context : William Ross Knudsen (1892-1977) was an American socialist political activist and trade union organizer.
Subject : William Ross Knudsen
Relation : residence

Answer: What city is William Ross Knudsen from?

Question: Context : ''The Incredible World of Horace Ford'' is an episode in season four of the American television anthology series The Twilight Zone.
Subject : The Incredible World of Horace Ford
Relation : series

Answer: The The Incredible World of Horace Ford is part of a what series?

Question: Context : Wagon Train is an American Western series that ran on NBC 1957--62 and then on ABC 1962--65, although the network also aired daytime repeats, as Major Adams, Trailmaster and Trailmaster (post-1961 episodes without original series lead Ward Bond), from January 1963 to September 1965.
Subject : Wagon Train
Relation : original network

Answer:
What was the original network for Wagon Train?