Question: who are the actors in singing in the rain
[{'answer': 'Gene Kelly', 'provenance': [{'wikipedia_id': '1883157', 'title': "Singin' in the Rain", 'start_paragraph_id': 1, 'start_character': 98, 'end_paragraph_id': 1, 'end_character': 108, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Debbie Reynolds', 'provenance': [{'wikipedia_id': '1883157', 'title': "Singin' in the Rain", 'start_paragraph_id': 1, 'start_character': 165, 'end_paragraph_id': 1, 'end_character': 180, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': "Donald O'Connor", 'provenance': [{'wikipedia_id': '1883157', 'title': "Singin' in the Rain", 'start_paragraph_id': 1, 'start_character': 144, 'end_paragraph_id': 1, 'end_character': 159, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Jean Hagen', 'provenance': [{'wikipedia_id': '1883157', 'title': "Singin' in the Rain", 'start_paragraph_id': 2, 'start_character': 240, 'end_paragraph_id': 2, 'end_character': 250, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Millard Mitchell', 'provenance': [{'wikipedia_id': '1883157', 'title': "Singin' in the Rain", 'start_paragraph_id': 6, 'start_character': 59, 'end_paragraph_id': 6, 'end_character': 75, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'answer': 'Cyd Charisse', 'provenance': [{'wikipedia_id': '1883157', 'title': "Singin' in the Rain", 'start_paragraph_id': 68, 'start_character': 1055, 'end_paragraph_id': 68, 'end_character': 1067, 'bleu_score': 1.0, 'section': 'Section::::Reception.:Critical response.\n'}]}, {'answer': 'Douglas Fowley', 'provenance': [{'wikipedia_id': '1883157', 'title': "Singin' in the Rain", 'start_paragraph_id': 17, 'start_character': 12, 'end_paragraph_id': 17, 'end_character': 26, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}, {'answer': 'Rita Moreno', 'provenance': [{'wikipedia_id': '1883157', 'title': "Singin' in the Rain", 'start_paragraph_id': 18, 'start_character': 12, 'end_paragraph_id': 18, 'end_character': 23, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}]