Question: who did the voice of hal in 2001
[{'answer': 'Douglas Rain', 'provenance': [{'wikipedia_id': '315086', 'title': 'Douglas Rain', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '315086', 'title': 'Douglas Rain', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 217, 'bleu_score': 0.507966409429755, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3246558192369356057}, 'section': 'Section::::Abstract.'}]}]