Question: which type of air masses are associated with dry cool weather
[{'answer': 'Continental Polar', 'provenance': [{'wikipedia_id': '261690', 'title': 'Air mass', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Characteristics.\n'}]}]