Question: who played buck rogers in the 25th century
[{'answer': 'Gil Gerard', 'provenance': [{'wikipedia_id': '2740780', 'title': 'Buck Rogers in the 25th Century (TV series)', 'start_paragraph_id': 5, 'start_character': 76, 'end_paragraph_id': 5, 'end_character': 86, 'bleu_score': 1.0, 'section': 'Section::::Concept and broadcast history.\n'}]}]