Question: who plays walt longmire on the show longmire
[{'answer': 'Robert Taylor', 'provenance': [{'wikipedia_id': '35388215', 'title': 'Longmire (TV series)', 'start_paragraph_id': 4, 'start_character': 15, 'end_paragraph_id': 4, 'end_character': 28, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '35388215', 'title': 'Longmire (TV series)', 'start_paragraph_id': 15, 'start_character': 12, 'end_paragraph_id': 15, 'end_character': 564, 'bleu_score': 0.947612593724081, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16330137369075698967}, 'section': 'Section::::Cast and characters.:Main.\n'}]}]