Question: who plays elizabeth bennet in the movie pride and prejudice
[{'answer': 'Keira Knightley', 'provenance': [{'wikipedia_id': '2312056', 'title': 'Pride & Prejudice (2005 film)', 'start_paragraph_id': 1, 'start_character': 257, 'end_paragraph_id': 1, 'end_character': 272, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2312056', 'title': 'Pride & Prejudice (2005 film)', 'start_paragraph_id': 16, 'start_character': 0, 'end_paragraph_id': 16, 'end_character': 47, 'bleu_score': 0.6147881529512641, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10960954727171825860}, 'section': 'Section::::Cast.\n'}]}]