Question: who starred in pirates of the caribbean 4
[{'answer': 'Johnny Depp', 'provenance': [{'wikipedia_id': '24314116', 'title': 'Pirates of the Caribbean: On Stranger Tides', 'start_paragraph_id': 1, 'start_character': 517, 'end_paragraph_id': 1, 'end_character': 528, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Penélope Cruz', 'provenance': [{'wikipedia_id': '24314116', 'title': 'Pirates of the Caribbean: On Stranger Tides', 'start_paragraph_id': 1, 'start_character': 553, 'end_paragraph_id': 1, 'end_character': 566, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Ian McShane', 'provenance': [{'wikipedia_id': '24314116', 'title': 'Pirates of the Caribbean: On Stranger Tides', 'start_paragraph_id': 1, 'start_character': 653, 'end_paragraph_id': 1, 'end_character': 664, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '24314116', 'title': 'Pirates of the Caribbean: On Stranger Tides', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 860, 'bleu_score': 0.877826495873759, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13799820157120092041}, 'section': 'Section::::Abstract.'}]}]