user: Question: What is the lowest rank of a company with 248.44 billions of dollars in assets?
Columns: ['Rank', 'Company', 'Headquarters', 'Industry', 'Sales (billion $)', 'Profits (billion $)', 'Assets (billion $)', 'Market Value (billion $)']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Citigroup', 'USA', 'Banking', '146.56', '21.54', '1,884.32', '247.42']
SQL:

assistant: SELECT MIN("Rank") FROM "Table" WHERE "Assets (billion $)" = '248.44';