Question: who is the actor that plays cullen bohannon on hell on wheels
[{'answer': 'Anson Adams Mount IV', 'provenance': [{'wikipedia_id': '3110845', 'title': 'Anson Mount', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]