Question: what does lx stand for in roman numerals
[{'answer': '9', 'provenance': [{'wikipedia_id': '25657', 'title': 'Roman numerals', 'start_paragraph_id': 4, 'start_character': 83, 'end_paragraph_id': 4, 'end_character': 84, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]