Question: when did turkey became part of european union
[{'answer': '1949 .', 'provenance': [{'wikipedia_id': '1283036', 'title': 'Accession of Turkey to the European Union', 'start_paragraph_id': 1, 'start_character': 313, 'end_paragraph_id': 1, 'end_character': 322, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1283036', 'title': 'Accession of Turkey to the European Union', 'start_paragraph_id': 1, 'start_character': 39, 'end_paragraph_id': 1, 'end_character': 612, 'bleu_score': 0.8577904072836091, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4907973399397296921}, 'section': 'Section::::Abstract.'}]}]