Question: when was wake island acquired by the us
[{'answer': '1899', 'provenance': [{'wikipedia_id': '353264', 'title': 'United States territorial acquisitions', 'start_paragraph_id': 52, 'start_character': 31, 'end_paragraph_id': 52, 'end_character': 35, 'bleu_score': 1.0, 'section': 'Section::::International law.\n'}]}]