Question: when was don't ask don't tell established
[{'answer': 'February 28 , 1994', 'provenance': [{'wikipedia_id': '8690', 'title': "Don't ask, don't tell", 'start_paragraph_id': 1, 'start_character': 167, 'end_paragraph_id': 1, 'end_character': 185, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '8690', 'title': "Don't ask, don't tell", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1035, 'bleu_score': 0.9308550351013931, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11665399713035720252}, 'section': 'Section::::Abstract.'}]}]