Question: who is the original singer of you were always on my mind
[{'answer': 'Gwen McCrae', 'provenance': [{'wikipedia_id': '1652526', 'title': 'Always on My Mind', 'start_paragraph_id': 1, 'start_character': 148, 'end_paragraph_id': 1, 'end_character': 159, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]