Question: who sang delta dawn first helen reddy and tanya tucker
[{'answer': 'Tanya Tucker', 'provenance': [{'wikipedia_id': '1757468', 'title': 'Delta Dawn', 'start_paragraph_id': 1, 'start_character': 150, 'end_paragraph_id': 1, 'end_character': 162, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1757468', 'title': 'Delta Dawn', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 207, 'bleu_score': 0.9493253852526031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6079136577715461028}, 'section': 'Section::::Abstract.'}]}]