Question: who lets new states become part of the us
[{'answer': 'Congress', 'provenance': [{'wikipedia_id': '30688587', 'title': 'Admission to the Union', 'start_paragraph_id': 1, 'start_character': 154, 'end_paragraph_id': 1, 'end_character': 162, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '30688587', 'title': 'Admission to the Union', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 292, 'bleu_score': 0.791534580080621, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9319000801733875938}, 'section': 'Section::::Abstract.'}]}]