Question: when did the canary islands become spanish territory
[{'answer': '1496', 'provenance': [{'wikipedia_id': '5717', 'title': 'Canary Islands', 'start_paragraph_id': 54, 'start_character': 82, 'end_paragraph_id': 54, 'end_character': 86, 'bleu_score': 1.0, 'section': 'Section::::History.:Castilian conquest.\n'}]}]