Question: who played flash gordon in the tv series
[{'answer': 'Steve Holland', 'provenance': [{'wikipedia_id': '2456854', 'title': 'Flash Gordon (1954 TV series)', 'start_paragraph_id': 6, 'start_character': 12, 'end_paragraph_id': 6, 'end_character': 25, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}, {'provenance': [{'wikipedia_id': '2456854', 'title': 'Flash Gordon (1954 TV series)', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 41, 'bleu_score': 0.6147881529512641, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17320639250957096844}, 'section': 'Section::::Cast.\n'}]}]