user: Question: What is the frequency of the station owned by the Canadian Broadcasting Corporation and branded as CBC Radio One?
Columns: ['Frequency', 'Call sign', 'Branding', 'Format', 'Owner']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['AM 620', 'CKRM', '620 CKRM', 'country music', 'Harvard Broadcasting']
SQL:

assistant: SELECT "Frequency" FROM "Table" WHERE "Owner" = 'Canadian Broadcasting Corporation' AND "Branding" = 'CBC Radio One';