Question: when did germany invade france in world war 2
[{'answer': '10 May 1940', 'provenance': [{'wikipedia_id': '228080', 'title': 'Battle of France', 'start_paragraph_id': 1, 'start_character': 210, 'end_paragraph_id': 1, 'end_character': 221, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '228080', 'title': 'Battle of France', 'start_paragraph_id': 1, 'start_character': 4, 'end_paragraph_id': 1, 'end_character': 485, 'bleu_score': 0.8109251523455271, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 896574621852822130}, 'section': 'Section::::Abstract.'}]}]