Question: who sang the original just the two of us
[{'answer': 'Grover Washington Jr.', 'provenance': [{'wikipedia_id': '11987432', 'title': 'Just the Two of Us (Grover Washington Jr. song)', 'start_paragraph_id': 0, 'start_character': 20, 'end_paragraph_id': 0, 'end_character': 41, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Bill Withers', 'provenance': [{'wikipedia_id': '11987432', 'title': 'Just the Two of Us (Grover Washington Jr. song)', 'start_paragraph_id': 1, 'start_character': 51, 'end_paragraph_id': 1, 'end_character': 63, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '11987432', 'title': 'Just the Two of Us (Grover Washington Jr. song)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 442, 'bleu_score': 0.5973759212741561, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8330128089027937728}, 'section': 'Section::::Background.\n'}]}]