Question: who played william seward in the movie lincoln
[{'answer': 'David Strathairn', 'provenance': [{'wikipedia_id': '31724592', 'title': 'Lincoln (film)', 'start_paragraph_id': 1, 'start_character': 180, 'end_paragraph_id': 1, 'end_character': 196, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31724592', 'title': 'Lincoln (film)', 'start_paragraph_id': 32, 'start_character': 0, 'end_paragraph_id': 32, 'end_character': 68, 'bleu_score': 0.7860753021519781, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3095447257810106120}, 'section': 'Section::::Cast.\n'}]}]