Question: Metro-Goldwyn-Mayer contract star Arlene Dahl starred in the film "Ambush" in 1950, which was based on a story of the same name written by who?
{'answer': 'Luke Short', 'supporting_facts': [['Ambush (1950 film)', 0], ['Ambush (1950 film)', 2], ['Arlene Dahl', 0]]}