Question: when were the statues on easter island built
[{'answer': '1100 -- 1680 CE'}, {'provenance': [{'wikipedia_id': '53418', 'title': 'Easter Island', 'start_paragraph_id': 94, 'start_character': 0, 'end_paragraph_id': 94, 'end_character': 539, 'bleu_score': 0.9030952865719301, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8162658180324196677}, 'section': 'Section::::Culture.:Stone work.:Statues.\n'}]}]