Question: which german state benefited most from the territorial changes made by the congress of vienna
[{'answer': 'German Kingdoms of Hanover', 'provenance': [{'wikipedia_id': '44628', 'title': 'Congress of Vienna', 'start_paragraph_id': 67, 'start_character': 286, 'end_paragraph_id': 67, 'end_character': 312, 'bleu_score': 1.0, 'section': 'Section::::Final Act.:Other changes.\n'}]}, {'provenance': [{'wikipedia_id': '44628', 'title': 'Congress of Vienna', 'start_paragraph_id': 67, 'start_character': 0, 'end_paragraph_id': 67, 'end_character': 814, 'bleu_score': 0.9832621206481431, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10019219278423474618}, 'section': 'Section::::Final Act.:Other changes.\n'}]}]