Question: what is full form of casa in banking
[{'answer': 'current and savings account ratio', 'provenance': [{'wikipedia_id': '27667643', 'title': 'CASA ratio', 'start_paragraph_id': 1, 'start_character': 22, 'end_paragraph_id': 1, 'end_character': 55, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '27667643', 'title': 'CASA ratio', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 646, 'bleu_score': 0.983401048538667, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3580968826589904732}, 'section': 'Section::::Abstract.'}]}]