Question: secret train tunnel from grand central to the waldorf-astoria
[{'answer': 'Track 61', 'provenance': [{'wikipedia_id': '42644772', 'title': 'Track 61 (New York City)', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 8, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '42644772', 'title': 'Track 61 (New York City)', 'start_paragraph_id': 1, 'start_character': 47, 'end_paragraph_id': 1, 'end_character': 310, 'bleu_score': 0.5665040816412601, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11154353932260050595}, 'section': 'Section::::Abstract.'}]}]