Question: how many national parks are there in alberta
[{'answer': 'Banff', 'provenance': [{'wikipedia_id': '44519', 'title': 'List of National Parks of Canada', 'start_paragraph_id': 2, 'start_character': 379, 'end_paragraph_id': 2, 'end_character': 384, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Elk Island'}, {'answer': 'Jasper', 'provenance': [{'wikipedia_id': '44519', 'title': 'List of National Parks of Canada', 'start_paragraph_id': 2, 'start_character': 671, 'end_paragraph_id': 2, 'end_character': 677, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Waterton Lakes'}, {'answer': 'Wood Buffalo', 'provenance': [{'wikipedia_id': '44519', 'title': 'List of National Parks of Canada', 'start_paragraph_id': 2, 'start_character': 1263, 'end_paragraph_id': 2, 'end_character': 1275, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]