Question: when did ted hughes wrote the iron man
[{'answer': '1968', 'provenance': [{'wikipedia_id': '1769647', 'title': 'The Iron Man (novel)', 'start_paragraph_id': 1, 'start_character': 53, 'end_paragraph_id': 1, 'end_character': 57, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1769647', 'title': 'The Iron Man (novel)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 702, 'bleu_score': 0.916241614217642, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6755010491251500206}, 'section': 'Section::::Abstract.'}]}]