Question: what was the first national legislature established by the articles of confederation
[{'answer': 'Congress of the Confederation', 'provenance': [{'wikipedia_id': '691', 'title': 'Articles of Confederation', 'start_paragraph_id': 2, 'start_character': 556, 'end_paragraph_id': 2, 'end_character': 585, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]