Question: what is the length of the belmont race
[{'answer': '1.5 - mile - long'}, {'provenance': [{'wikipedia_id': '62398', 'title': 'Belmont Stakes', 'start_paragraph_id': 1, 'start_character': 113, 'end_paragraph_id': 1, 'end_character': 891, 'bleu_score': 0.6729841612010551, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1464411628990882109}, 'section': 'Section::::Abstract.'}]}]