Question: who plays david on once upon a time
[{'answer': 'Joshua Paul Dallas', 'provenance': [{'wikipedia_id': '29850778', 'title': 'Josh Dallas', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 18, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '29850778', 'title': 'Josh Dallas', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 230, 'bleu_score': 0.9517713210466091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3778152924695699282}, 'section': 'Section::::Abstract.'}]}]