Question: who played mr. freeze on the tv series batman
[{'answer': 'George Sanders', 'provenance': [{'wikipedia_id': '18588727', 'title': 'Mr. Freeze', 'start_paragraph_id': 2, 'start_character': 140, 'end_paragraph_id': 2, 'end_character': 154, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Otto Preminger', 'provenance': [{'wikipedia_id': '18588727', 'title': 'Mr. Freeze', 'start_paragraph_id': 2, 'start_character': 156, 'end_paragraph_id': 2, 'end_character': 170, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Eli Wallach', 'provenance': [{'wikipedia_id': '18588727', 'title': 'Mr. Freeze', 'start_paragraph_id': 2, 'start_character': 176, 'end_paragraph_id': 2, 'end_character': 187, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18588727', 'title': 'Mr. Freeze', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 470, 'bleu_score': 0.691289129465113, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9805112539177958322}, 'section': 'Section::::Abstract.'}]}]