Question: how many nfc championships have the packers won
[{'answer': 'three', 'provenance': [{'wikipedia_id': '12663', 'title': 'Green Bay Packers', 'start_paragraph_id': 19, 'start_character': 158, 'end_paragraph_id': 19, 'end_character': 163, 'bleu_score': 1.0, 'section': "Section::::History.:1959–1967: The Lombardi era and the glory years.:1959: Lombardi's first season.\n"}]}, {'provenance': [{'wikipedia_id': '12663', 'title': 'Green Bay Packers', 'start_paragraph_id': 144, 'start_character': 0, 'end_paragraph_id': 144, 'end_character': 121, 'bleu_score': 0.9067110266941041, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 151949997169304827}, 'section': 'Section::::Championships.:NFC Championships.\n'}]}]