Question: who sang the theme song for the brady bunch
[{'answer': 'Peppermint Trolley Company', 'provenance': [{'wikipedia_id': '39732', 'title': 'The Brady Bunch', 'start_paragraph_id': 51, 'start_character': 166, 'end_paragraph_id': 51, 'end_character': 192, 'bleu_score': 1.0, 'section': 'Section::::Production notes.:Theme song and credits sequence.\n'}]}, {'provenance': [{'wikipedia_id': '39732', 'title': 'The Brady Bunch', 'start_paragraph_id': 51, 'start_character': 0, 'end_paragraph_id': 51, 'end_character': 881, 'bleu_score': 0.790917543626324, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7196202578157985318}, 'section': 'Section::::Production notes.:Theme song and credits sequence.\n'}]}]