user: Question: What is the frequency with 900W power?
Columns: ['Transmitter Site', 'Frequency', 'Power', 'RDS Name', 'PI Code', 'Area']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Chilworth', '107.8MHz', '900W', '_Breeze_', 'C3BA (C4BA Switched)', 'Southampton & South West Hampshire']
SQL:

assistant: SELECT "Frequency" FROM "Table" WHERE "Power" = '900W';