Question: who is the girl that sings with toby mac
[{'answer': 'Hollyn', 'provenance': [{'wikipedia_id': '48243351', 'title': 'Hollyn', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 6, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '48243351', 'title': 'Hollyn', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 981, 'bleu_score': 0.965105441939979, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2407436632486222796}, 'section': 'Section::::Music career.\n'}]}]