Question: who played lex luthor in the original superman movie
[{'answer': 'Gene Hackman', 'provenance': [{'wikipedia_id': '362719', 'title': 'Superman (1978 film)', 'start_paragraph_id': 1, 'start_character': 389, 'end_paragraph_id': 1, 'end_character': 401, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '362719', 'title': 'Superman (1978 film)', 'start_paragraph_id': 14, 'start_character': 0, 'end_paragraph_id': 14, 'end_character': 203, 'bleu_score': 0.9419661180380051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14119862914727329148}, 'section': 'Section::::Cast.\n'}]}]