Question: who sings the theme song to laverne and shirley
[{'answer': 'Cyndi Grecco', 'provenance': [{'wikipedia_id': '4219418', 'title': 'Cyndi Grecco', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]