Question: who played nero wolfe in the tv series
[{'answer': 'William Conrad', 'provenance': [{'wikipedia_id': '17189526', 'title': 'Nero Wolfe (1981 TV series)', 'start_paragraph_id': 1, 'start_character': 150, 'end_paragraph_id': 1, 'end_character': 164, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '17189526', 'title': 'Nero Wolfe (1981 TV series)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 425, 'bleu_score': 0.972782728923768, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14833215223700038742}, 'section': 'Section::::Abstract.'}]}]