Question: who plays the black knight in family guy
[{'answer': 'Will Ferrell', 'provenance': [{'wikipedia_id': '2423617', 'title': 'Mr. Saturday Knight', 'start_paragraph_id': 1, 'start_character': 97, 'end_paragraph_id': 1, 'end_character': 109, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2423617', 'title': 'Mr. Saturday Knight', 'start_paragraph_id': 1, 'start_character': 91, 'end_paragraph_id': 1, 'end_character': 129, 'bleu_score': 0.6803749333171201, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8844708307177562396}, 'section': 'Section::::Abstract.'}]}]