Question: What plot follows Barden University's all-girl a cappella group, The Barden Bellas, as they compete against another a cappella group from their college to win Nationals, and starred an actress known for her role of Alexis in the party film "Project X"?
{'answer': 'Pitch Perfect', 'supporting_facts': [['Alexis Knapp', 1], ['Alexis Knapp', 2], ['Pitch Perfect', 0], ['Pitch Perfect', 2], ['Pitch Perfect', 3]]}