Question: who sings let's go fly a kite in mary poppins
[{'answer': 'David Tomlinson', 'provenance': [{'wikipedia_id': '7630679', 'title': "Let's Go Fly a Kite", 'start_paragraph_id': 1, 'start_character': 197, 'end_paragraph_id': 1, 'end_character': 212, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Dick van Dyke', 'provenance': [{'wikipedia_id': '7630679', 'title': "Let's Go Fly a Kite", 'start_paragraph_id': 1, 'start_character': 373, 'end_paragraph_id': 1, 'end_character': 386, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]