Question: who plays the grim reaper in bill and ted
[{'answer': 'William Thomas Sadler', 'provenance': [{'wikipedia_id': '24699420', 'title': 'William Sadler (actor)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '24699420', 'title': 'William Sadler (actor)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 846, 'bleu_score': 0.7974708699667911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10902806600232905959}, 'section': 'Section::::Abstract.'}]}]