Question: when was the last time iran went to world cup
[{'answer': '2018', 'provenance': [{'wikipedia_id': '272865', 'title': 'Iran national football team', 'start_paragraph_id': 1, 'start_character': 204, 'end_paragraph_id': 1, 'end_character': 208, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '272865', 'title': 'Iran national football team', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 483, 'bleu_score': 0.957795280617293, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3744464935125878594}, 'section': 'Section::::Abstract.'}]}]