user: Question: Name the industry for revenue being 2.1
Columns: ['World Rank', 'Company', 'Industry', 'Revenue (billion $)', 'Profits (billion $)', 'Assets (billion $)', 'Market Value (billion $)']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [332.0, 'Maybank', 'Banking', '9.1', '1.9', '161.4', '24.3']
SQL:

assistant: SELECT "Industry" FROM "Table" WHERE "Revenue (billion $)" = '2.1';