Question: what is the name of the train station in vienna
[{'answer': 'Wien Hauptbahnhof', 'provenance': [{'wikipedia_id': '11298607', 'title': 'Wien Hauptbahnhof', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 17, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '11298607', 'title': 'Wien Hauptbahnhof', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 237, 'bleu_score': 0.9451524926983921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 346791454201450424}, 'section': 'Section::::Abstract.'}]}]