Question: when was the immigration and nationality act passed
[{'answer': 'June 27 , 1952', 'provenance': [{'wikipedia_id': '1576460', 'title': 'Immigration and Nationality Act of 1952', 'start_paragraph_id': 5, 'start_character': 323, 'end_paragraph_id': 5, 'end_character': 337, 'bleu_score': 1.0, 'section': 'Section::::Legislative history.\n'}]}, {'provenance': [{'wikipedia_id': '1576460', 'title': 'Immigration and Nationality Act of 1952', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 354, 'bleu_score': 0.744024084469265, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5650483914360495763}, 'section': 'Section::::Abstract.'}]}]