Question: when did germany take alsace-lorraine region from france in the franco-prussian war
[{'answer': '10 May 1871', 'provenance': [{'wikipedia_id': '44035', 'title': 'Franco-Prussian War', 'start_paragraph_id': 4, 'start_character': 167, 'end_paragraph_id': 4, 'end_character': 178, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '44035', 'title': 'Franco-Prussian War', 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 564, 'bleu_score': 0.73058566361957, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16356224939385994737}, 'section': 'Section::::Abstract.'}]}]