Question: when did the events at flannan isle occur
[{'answer': '1900', 'provenance': [{'wikipedia_id': '39378128', 'title': 'Flannan Isles Lighthouse', 'start_paragraph_id': 1, 'start_character': 226, 'end_paragraph_id': 1, 'end_character': 230, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]