Question: who directed harry potter and the philosophers stone
[{'answer': 'Chris Columbus', 'provenance': [{'wikipedia_id': '667361', 'title': "Harry Potter and the Philosopher's Stone (film)", 'start_paragraph_id': 1, 'start_character': 169, 'end_paragraph_id': 1, 'end_character': 183, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '667361', 'title': "Harry Potter and the Philosopher's Stone (film)", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 692, 'bleu_score': 0.8709401953655841, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9442313328149542196}, 'section': 'Section::::Abstract.'}]}]