Question: which countries did not sign the un convention on the rights of the child
[{'answer': 'South Sudan', 'provenance': [{'wikipedia_id': '46489', 'title': 'Convention on the Rights of the Child', 'start_paragraph_id': 19, 'start_character': 289, 'end_paragraph_id': 19, 'end_character': 300, 'bleu_score': 1.0, 'section': 'Section::::States party and signatories.\n'}]}, {'provenance': [{'wikipedia_id': '46489', 'title': 'Convention on the Rights of the Child', 'start_paragraph_id': 19, 'start_character': 0, 'end_paragraph_id': 19, 'end_character': 510, 'bleu_score': 0.9751504244977051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1558443786212408610}, 'section': 'Section::::States party and signatories.\n'}]}]