Question: who sings stop listen what's that sound
[{'answer': 'Buffalo Springfield', 'provenance': [{'wikipedia_id': '1215271', 'title': "For What It's Worth", 'start_paragraph_id': 1, 'start_character': 154, 'end_paragraph_id': 1, 'end_character': 173, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1215271', 'title': "For What It's Worth", 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12441305927545497659}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1215271', 'title': "For What It's Worth", 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['"For What It\'s Worth (Stop, Hey What\'s That Sound)" (often referred to as simply "For What It\'s Worth") is a song written by Stephen Stills. Performed by Buffalo Springfield', 'Performed by Buffalo Springfield, it was recorded on December 5, 1966; released as a single on Atco Records on December 23, 1966; and peaked at No. 7 on the "Billboard" Hot 100 chart.', '"For What It\'s Worth (Stop, Hey What\'s That Sound)" (often referred to as simply "For What It\'s Worth") is a song written by Stephen Stills. Performed by Buffalo Springfield, it was recorded on December 5, 1966; released as a single on Atco Records on December 23, 1966; and peaked at No. 7 on the "Billboard" Hot 100 chart.']}}]}]