Task: Question Generation
Input (English): 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
Output (English): What was the original network for Wagon Train?