Question: who led an expedition to the edge of oklahoma
[{'answer': 'Richard Sparks', 'provenance': [{'wikipedia_id': '8601128', 'title': 'Red River Expedition (1806)', 'start_paragraph_id': 5, 'start_character': 454, 'end_paragraph_id': 5, 'end_character': 468, 'bleu_score': 1.0, 'section': 'Section::::Planning.\n'}]}, {'provenance': [{'wikipedia_id': '8601128', 'title': 'Red River Expedition (1806)', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 634, 'bleu_score': 0.9804854598160591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7269358697100234211}, 'section': 'Section::::Planning.\n'}]}]