Question: who sang the song wreck of the edmund fitzgerald
[{'answer': 'Gordon Lightfoot', 'provenance': [{'wikipedia_id': '329820', 'title': 'The Wreck of the Edmund Fitzgerald', 'start_paragraph_id': 1, 'start_character': 111, 'end_paragraph_id': 1, 'end_character': 127, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '329820', 'title': 'The Wreck of the Edmund Fitzgerald', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 431, 'bleu_score': 0.9348189981364851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 901247874967174901}, 'section': 'Section::::Abstract.'}]}]