Question: who played solomon in 12 years a slave
[{'answer': 'Chiwetel Ejiofor', 'provenance': [{'wikipedia_id': '37125755', 'title': '12 Years a Slave (film)', 'start_paragraph_id': 2, 'start_character': 83, 'end_paragraph_id': 2, 'end_character': 99, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '37125755', 'title': '12 Years a Slave (film)', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 570, 'bleu_score': 0.9766041382465441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16928949937018455491}, 'section': 'Section::::Abstract.'}]}]