Task: Question Generation
Input (English): Goetz set out an ambitious schedule. Universal-International became responsible for the American distribution of Rank's British productions, including such classics as David Lean's Great Expectations (1946) and Laurence Olivier's Hamlet (1948). Broadening its scope further, Universal-International branched out into the lucrative non-theatrical field, buying a majority stake in home-movie dealer Castle Films in 1947, and taking the company over entirely in 1951. For three decades, Castle would offer "highlights" reels from the Universal film library to home-movie enthusiasts and collectors. Goetz licensed Universal's pre–Universal-International film library to Jack Broeder's Realart Pictures for cinema re-release but Realart was not allowed to show the films on television.
Output (English): In what year did Universal-International take over Castle Films?