Question: what is the legal age of marriage in usa
[{'answer': '18', 'provenance': [{'wikipedia_id': '41860150', 'title': 'Marriage age in the United States', 'start_paragraph_id': 1, 'start_character': 238, 'end_paragraph_id': 1, 'end_character': 240, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Nebraska ( 19 )'}, {'answer': 'Mississippi ( 21 )'}]