Question: who sings the song don't let me down
[{'answer': 'American production duo The Chainsmokers', 'provenance': [{'wikipedia_id': '49517487', 'title': "Don't Let Me Down (The Chainsmokers song)", 'start_paragraph_id': 1, 'start_character': 33, 'end_paragraph_id': 1, 'end_character': 73, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'American singer Daya', 'provenance': [{'wikipedia_id': '49517487', 'title': "Don't Let Me Down (The Chainsmokers song)", 'start_paragraph_id': 1, 'start_character': 107, 'end_paragraph_id': 1, 'end_character': 127, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '49517487', 'title': "Don't Let Me Down (The Chainsmokers song)", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 360, 'bleu_score': 0.9684940092844061, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5089497956790525938}, 'section': 'Section::::Abstract.'}]}]