Question: when was un declaration of human rights written
[{'answer': 'May 1948', 'provenance': [{'wikipedia_id': '31899', 'title': 'Universal Declaration of Human Rights', 'start_paragraph_id': 27, 'start_character': 40, 'end_paragraph_id': 27, 'end_character': 48, 'bleu_score': 1.0, 'section': 'Section::::History.:Creation and drafting.\n'}]}, {'provenance': [{'wikipedia_id': '31899', 'title': 'Universal Declaration of Human Rights', 'start_paragraph_id': 27, 'start_character': 0, 'end_paragraph_id': 27, 'end_character': 324, 'bleu_score': 0.962600167205617, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1507166475247904208}, 'section': 'Section::::History.:Creation and drafting.\n'}]}]