Question: what document led to the formation of a bicameral legislature
[{'answer': 'The Virginia Plan', 'provenance': [{'wikipedia_id': '318325', 'title': 'Virginia Plan', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '318325', 'title': 'Virginia Plan', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 513, 'bleu_score': 0.976327165973018, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16590577231006164332}, 'section': 'Section::::Abstract.'}]}]