Question: who sings there is nothing holding me back
[{'answer': 'Shawn Mendes', 'provenance': [{'wikipedia_id': '53813000', 'title': "There's Nothing Holdin' Me Back", 'start_paragraph_id': 1, 'start_character': 72, 'end_paragraph_id': 1, 'end_character': 84, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '53813000', 'title': "There's Nothing Holdin' Me Back", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 464, 'bleu_score': 0.882244005625312, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12587337114157646817}, 'section': 'Section::::Abstract.'}]}]