Question: when was the first missouri state constitution written
[{'answer': '1820', 'provenance': [{'wikipedia_id': '19516916', 'title': 'Constitution of Missouri', 'start_paragraph_id': 3, 'start_character': 38, 'end_paragraph_id': 3, 'end_character': 42, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '19516916', 'title': 'Constitution of Missouri', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 184, 'bleu_score': 0.934334813046729, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10480031401938135845}, 'section': 'Section::::History.\n'}]}]