Question: what is the number on the hogwarts express
[{'answer': '5972', 'provenance': [{'wikipedia_id': '1811977', 'title': 'GWR 4900 Class 5972 Olton Hall', 'start_paragraph_id': 0, 'start_character': 15, 'end_paragraph_id': 0, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1811977', 'title': 'GWR 4900 Class 5972 Olton Hall', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 449, 'bleu_score': 0.9348189981364851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8431717193581203998}, 'section': 'Section::::Preservation.:"Harry Potter" film series.\n'}]}]