Question: when did pakistan become member of united nations
[{'answer': '30 September 1947', 'provenance': [{'wikipedia_id': '30381193', 'title': 'Pakistan and the United Nations', 'start_paragraph_id': 1, 'start_character': 54, 'end_paragraph_id': 1, 'end_character': 71, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '30381193', 'title': 'Pakistan and the United Nations', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 286, 'bleu_score': 0.535810057062386, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9497461009410974837}, 'section': 'Section::::Abstract.'}]}]