Question: when did statue of liberty became a national monument
[{'answer': '1924', 'provenance': [{'wikipedia_id': '28617', 'title': 'Statue of Liberty', 'start_paragraph_id': 59, 'start_character': 3, 'end_paragraph_id': 59, 'end_character': 7, 'bleu_score': 1.0, 'section': 'Section::::After dedication.:Lighthouse Board and War Department (1886–1933).\n'}]}, {'provenance': [{'wikipedia_id': '28617', 'title': 'Statue of Liberty', 'start_paragraph_id': 59, 'start_character': 0, 'end_paragraph_id': 59, 'end_character': 341, 'bleu_score': 0.96746874041754, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 633069706798202160}, 'section': 'Section::::After dedication.:Lighthouse Board and War Department (1886–1933).\n'}]}]