user: Question: What is the frequency for the radio owned by Bell Media with a call sign of CHSU-FM?
Columns: ['Frequency', 'Call sign', 'Branding', 'Format', 'Owner']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1150 AM', 'CKFR', 'AM 1150', 'news / talk', 'Astral Media']
SQL:

assistant: SELECT "Frequency" FROM "Table" WHERE "Owner" = 'Bell Media' AND "Call sign" = 'CHSU-FM';