Question: the british introduced which disease to the native american tribes after the french and indian war
[{'answer': 'smallpox', 'provenance': [{'wikipedia_id': '24545319', 'title': 'Native American disease and epidemics', 'start_paragraph_id': 5, 'start_character': 59, 'end_paragraph_id': 5, 'end_character': 67, 'bleu_score': 1.0, 'section': 'Section::::European contact.\n'}]}, {'provenance': [{'wikipedia_id': '24545319', 'title': 'Native American disease and epidemics', 'start_paragraph_id': 24, 'start_character': 0, 'end_paragraph_id': 24, 'end_character': 451, 'bleu_score': 0.970795021215021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17359536260497961422}, 'section': 'Section::::Disease as a weapon against Native Americans.:Biological warfare during the Siege of Fort Pitt.\n'}]}]