Question: who sings theme song to phineas and ferb
[{'answer': 'Bowling For Soup', 'provenance': [{'wikipedia_id': '23667534', 'title': 'List of Phineas and Ferb songs', 'start_paragraph_id': 4, 'start_character': 77, 'end_paragraph_id': 4, 'end_character': 93, 'bleu_score': 1.0, 'section': 'Section::::List of songs.:Theme Song.\n'}]}, {'provenance': [{'wikipedia_id': '23667534', 'title': 'List of Phineas and Ferb songs', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 487, 'bleu_score': 0.9458134147569861, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7542394145484150547}, 'section': 'Section::::List of songs.:Theme Song.\n'}]}]