Question: the reason for the start of world war 2
[{'answer': 'the German invasion of Poland', 'provenance': [{'wikipedia_id': '32927', 'title': 'World War II', 'start_paragraph_id': 7, 'start_character': 88, 'end_paragraph_id': 7, 'end_character': 117, 'bleu_score': 1.0, 'section': 'Section::::Chronology.\n'}]}, {'provenance': [{'wikipedia_id': '32927', 'title': 'World War II', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 368, 'bleu_score': 0.970795021215021, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5077279476416709121}, 'section': 'Section::::Chronology.\n'}]}]