Question: who is the original artist of sound of silence
[{'answer': 'Simon & Garfunkel', 'provenance': [{'wikipedia_id': '461959', 'title': 'The Sound of Silence', 'start_paragraph_id': 1, 'start_character': 98, 'end_paragraph_id': 1, 'end_character': 115, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '461959', 'title': 'The Sound of Silence', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 405, 'bleu_score': 0.913527280267825, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4528904192620806927}, 'section': 'Section::::Abstract.'}]}]