Question: when was the i want you poster created
[{'answer': '1914', 'provenance': [{'wikipedia_id': '6810396', 'title': 'Lord Kitchener Wants You', 'start_paragraph_id': 1, 'start_character': 30, 'end_paragraph_id': 1, 'end_character': 34, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6810396', 'title': 'Lord Kitchener Wants You', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 583, 'bleu_score': 0.9545695715275291, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4958106534314380441}, 'section': 'Section::::Abstract.'}]}]