Question: what city does supergirl protect in the show
[{'answer': 'National City', 'provenance': [{'wikipedia_id': '45167756', 'title': 'Supergirl (TV series)', 'start_paragraph_id': 5, 'start_character': 70, 'end_paragraph_id': 5, 'end_character': 83, 'bleu_score': 1.0, 'section': 'Section::::Series overview.\n'}]}, {'provenance': [{'wikipedia_id': '45167756', 'title': 'Supergirl (TV series)', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 413, 'bleu_score': 0.9574358640575391, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16887040891156945236}, 'section': 'Section::::Series overview.\n'}]}]