Question: when did prince edward island become a province
[{'answer': '1873', 'provenance': [{'wikipedia_id': '23071', 'title': 'Prince Edward Island', 'start_paragraph_id': 1, 'start_character': 337, 'end_paragraph_id': 1, 'end_character': 341, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]