Question: who played spock's dad on star trek
[{'answer': 'Mark Lenard', 'provenance': [{'wikipedia_id': '145408', 'title': 'Sarek', 'start_paragraph_id': 1, 'start_character': 217, 'end_paragraph_id': 1, 'end_character': 228, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '145408', 'title': 'Sarek', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 354, 'bleu_score': 0.565716618672592, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7609287015561707938}, 'section': 'Section::::Abstract.'}]}]