Question: who sings i want to be a millionaire
[{'answer': 'Travie McCoy', 'provenance': [{'wikipedia_id': '27037324', 'title': 'Billionaire (song)', 'start_paragraph_id': 1, 'start_character': 53, 'end_paragraph_id': 1, 'end_character': 65, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Bruno Mars', 'provenance': [{'wikipedia_id': '27037324', 'title': 'Billionaire (song)', 'start_paragraph_id': 1, 'start_character': 153, 'end_paragraph_id': 1, 'end_character': 163, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]