Question: when did spain cede florida to the us
[{'answer': '1819', 'provenance': [{'wikipedia_id': '236971', 'title': 'Adams–Onís Treaty', 'start_paragraph_id': 1, 'start_character': 28, 'end_paragraph_id': 1, 'end_character': 32, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]