Question: What Design Engineer who works at Ride Centerline LLC designed a roller coaster that operates at Six Flags Magic Mountain in Valencia, California?
{'answer': 'Alan Schilke', 'supporting_facts': [['Alan Schilke', 0], ['Alan Schilke', 1], ['Alan Schilke', 2], ['X2 (roller coaster)', 0], ['X2 (roller coaster)', 1]]}