Question: who wrote there's nothing holding me back by shawn mendes
[{'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.'}]}, {'answer': 'Teddy Geiger', 'provenance': [{'wikipedia_id': '53813000', 'title': "There's Nothing Holdin' Me Back", 'start_paragraph_id': 1, 'start_character': 105, 'end_paragraph_id': 1, 'end_character': 117, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Geoff Warburton', 'provenance': [{'wikipedia_id': '53813000', 'title': "There's Nothing Holdin' Me Back", 'start_paragraph_id': 1, 'start_character': 119, 'end_paragraph_id': 1, 'end_character': 134, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Scott Harris', 'provenance': [{'wikipedia_id': '53813000', 'title': "There's Nothing Holdin' Me Back", 'start_paragraph_id': 1, 'start_character': 139, 'end_paragraph_id': 1, 'end_character': 151, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]