user: ### NOW ANSWER:
Question: Which Hanzi has a Regional Population of 4,591,972 in 2010?
Columns: ['City', 'Hanzi', 'Hanyu Pinyin', 'Regional Population(2010)', 'GDP(2011)(billion yuan)']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['Shanghai', '上海', 'Shànghǎi', '23,019,148', 1919.57]
SQL:

assistant: SELECT "Hanzi" FROM "Table" WHERE "Regional Population(2010)" = '4,591,972';