Question: when was the reflecting pool in washington dc built
[{'answer': '1922 and 1923', 'provenance': [{'wikipedia_id': '631636', 'title': 'Lincoln Memorial Reflecting Pool', 'start_paragraph_id': 3, 'start_character': 89, 'end_paragraph_id': 3, 'end_character': 102, 'bleu_score': 1.0, 'section': 'Section::::Description.\n'}]}, {'provenance': [{'wikipedia_id': '631636', 'title': 'Lincoln Memorial Reflecting Pool', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 413, 'bleu_score': 0.669980100842772, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4854969272938333263}, 'section': 'Section::::Description.\n'}]}]