Question: who sang the theme to kelly's heroes
[{'answer': 'Mike Curb Congregation', 'provenance': [{'wikipedia_id': '933321', 'title': "Kelly's Heroes", 'start_paragraph_id': 57, 'start_character': 221, 'end_paragraph_id': 57, 'end_character': 243, 'bleu_score': 1.0, 'section': 'Section::::Musical score and soundtrack.\n'}]}, {'provenance': [{'wikipedia_id': '933321', 'title': "Kelly's Heroes", 'start_paragraph_id': 59, 'start_character': 0, 'end_paragraph_id': 59, 'end_character': 628, 'bleu_score': 0.588307743063411, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8457020656350472713}, 'section': 'Section::::Musical score and soundtrack.\n'}]}]