Question: who sang raindrops keep fallin on my head
[{'answer': 'B.J. Thomas', 'provenance': [{'wikipedia_id': '30857447', 'title': "Raindrops Keep Fallin' on My Head", 'start_paragraph_id': 4, 'start_character': 12, 'end_paragraph_id': 4, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Personnel.\n'}]}, {'provenance': [{'wikipedia_id': '30857447', 'title': "Raindrops Keep Fallin' on My Head", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 626, 'bleu_score': 0.923675270965665, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10683085583962186419}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '30857447', 'title': "Raindrops Keep Fallin' on My Head", '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': 10683085583962186419}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '30857447', 'title': "Raindrops Keep Fallin' on My Head", 'section': 'Section::::Personnel.\n', 'start_paragraph_id': 4, 'end_paragraph_id': 4, 'meta': {'evidence_span': ['B.J. Thomas - vocals', 'BULLET::::- B.J. Thomas - vocals', 'B.J. Thomas']}}]}]