Question: what made the british disperse after the burning of washington
[{'answer': 'very heavy thunderstorm', 'provenance': [{'wikipedia_id': '1335486', 'title': 'Burning of Washington', 'start_paragraph_id': 3, 'start_character': 50, 'end_paragraph_id': 3, 'end_character': 73, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1335486', 'title': 'Burning of Washington', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 555, 'bleu_score': 0.7701470239332711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14411088389605618727}, 'section': 'Section::::Abstract.'}]}]