Question: when does boy in the striped pajamas take place
[{'answer': 'World War II', 'provenance': [{'wikipedia_id': '5205080', 'title': 'The Boy in the Striped Pyjamas', 'start_paragraph_id': 3, 'start_character': 44, 'end_paragraph_id': 3, 'end_character': 56, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '5205080', 'title': 'The Boy in the Striped Pyjamas', 'start_paragraph_id': 3, 'start_character': 17, 'end_paragraph_id': 3, 'end_character': 1265, 'bleu_score': 0.8746882512845381, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4036717816931233156}, 'section': 'Section::::Plot.\n'}]}]