Question: who sang i will leave a light on
[{'answer': 'Tom Walker', 'provenance': [{'wikipedia_id': '56286216', 'title': 'Leave a Light On (Tom Walker song)', 'start_paragraph_id': 0, 'start_character': 18, 'end_paragraph_id': 0, 'end_character': 28, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '56286216', 'title': 'Leave a Light On (Tom Walker song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 421, 'bleu_score': 0.671880587027732, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14155966623333448929}, 'section': 'Section::::Abstract.'}]}]