user: Question: What is the frequency of KFNW?
Columns: ['Frequency', 'Call sign', 'Name', 'Format', 'Owner']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['740 AM', 'KVOX', '740 The Fan ( Fox Sports Radio )', 'Sports', 'Radio Fargo-Moorhead']
SQL:

assistant: SELECT "Frequency" FROM "Table" WHERE "Call sign" = 'KFNW';