Question: who migrated to kansas during the kansas exodus
[{'answer': 'African Americans', 'provenance': [{'wikipedia_id': '6186731', 'title': 'Exodusters', 'start_paragraph_id': 1, 'start_character': 31, 'end_paragraph_id': 1, 'end_character': 48, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6186731', 'title': 'Exodusters', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 510, 'bleu_score': 0.9437815816129681, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15733125430950721820}, 'section': 'Section::::Abstract.'}]}]