Question: when was the clear and present danger test replaced
[{'answer': 'May 1950', 'provenance': [{'wikipedia_id': '45254', 'title': 'Clear and present danger', 'start_paragraph_id': 9, 'start_character': 3, 'end_paragraph_id': 9, 'end_character': 11, 'bleu_score': 1.0, 'section': 'Section::::History.:"Dennis v. United States".\n'}]}, {'provenance': [{'wikipedia_id': '45254', 'title': 'Clear and present danger', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 620, 'bleu_score': 0.9450701851959151, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8916783504087115063}, 'section': 'Section::::History.:"Dennis v. United States".\n'}]}]