Question: which act lead to the disintegration of the whig party
[{'answer': 'Kansas -- Nebraska Act'}, {'provenance': [{'wikipedia_id': '32078', 'title': 'Whig Party (United States)', 'start_paragraph_id': 29, 'start_character': 0, 'end_paragraph_id': 29, 'end_character': 1602, 'bleu_score': 0.992110299569918, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6646477726387946028}, 'section': 'Section::::History.:Decline.\n'}]}]