Question: who was involved in the fugitive slave law
[{'answer': 'Southern slave - holding interests', 'provenance': [{'wikipedia_id': '385486', 'title': 'Fugitive Slave Act of 1850', 'start_paragraph_id': 1, 'start_character': 151, 'end_paragraph_id': 1, 'end_character': 187, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Northern Free - Soilers', 'provenance': [{'wikipedia_id': '385486', 'title': 'Fugitive Slave Act of 1850', 'start_paragraph_id': 1, 'start_character': 188, 'end_paragraph_id': 1, 'end_character': 210, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '385486', 'title': 'Fugitive Slave Act of 1850', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 209, 'bleu_score': 0.8374213307350811, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2033784349340687863}, 'section': 'Section::::Abstract.'}]}]