Question: when did hungary became part of the eu
[{'answer': '2004', 'provenance': [{'wikipedia_id': '27598309', 'title': 'History of Hungary', 'start_paragraph_id': 17, 'start_character': 134, 'end_paragraph_id': 17, 'end_character': 138, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '27598309', 'title': 'History of Hungary', 'start_paragraph_id': 221, 'start_character': 0, 'end_paragraph_id': 221, 'end_character': 524, 'bleu_score': 0.976043556018343, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4340575746479129084}, 'section': 'Section::::Modern history.:Post-War Communist period.:Post Revolution (or Kádár) era (1956–1989).:End of Communism.\n'}]}]