Question: when was the letter from birmingham jail published
[{'answer': 'June 1963', 'provenance': [{'wikipedia_id': '356391', 'title': 'Letter from Birmingham Jail', 'start_paragraph_id': 19, 'start_character': 368, 'end_paragraph_id': 19, 'end_character': 377, 'bleu_score': 1.0, 'section': 'Section::::Publication.\n'}]}, {'provenance': [{'wikipedia_id': '356391', 'title': 'Letter from Birmingham Jail', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 752, 'bleu_score': 0.9256053556479651, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13252033462366695861}, 'section': 'Section::::Publication.\n'}]}]