Question: operation overlord was the name given to secret planning for
[{'answer': 'the Battle of Normandy', 'provenance': [{'wikipedia_id': '6723726', 'title': 'Operation Overlord', 'start_paragraph_id': 1, 'start_character': 40, 'end_paragraph_id': 1, 'end_character': 62, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6723726', 'title': 'Operation Overlord', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 526, 'bleu_score': 0.9353868346438581, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16622658528597711130}, 'section': 'Section::::Abstract.'}]}]