Question: who played leatherface in texas chainsaw massacre 1974
[{'answer': 'Leatherface', 'provenance': [{'wikipedia_id': '29781', 'title': 'The Texas Chain Saw Massacre', 'start_paragraph_id': 1, 'start_character': 318, 'end_paragraph_id': 1, 'end_character': 329, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '29781', 'title': 'The Texas Chain Saw Massacre', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 784, 'bleu_score': 0.9247483186224531, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4651604635841206153}, 'section': 'Section::::Plot.\n'}]}]