Question: what is the highest category hurricane to hit north carolina
[{'answer': 'Category 4', 'provenance': [{'wikipedia_id': '3482778', 'title': 'List of North Carolina hurricanes', 'start_paragraph_id': 4, 'start_character': 548, 'end_paragraph_id': 4, 'end_character': 558, 'bleu_score': 1.0, 'section': 'Section::::Climatology.\n'}]}, {'provenance': [{'wikipedia_id': '3482778', 'title': 'List of North Carolina hurricanes', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 606, 'bleu_score': 0.9806740509884301, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7167504178183567601}, 'section': 'Section::::Climatology.\n'}]}]