user: Question: What is the frequency of the Classic Country KRKI-FM booster station?
Columns: ['Frequency', 'Call sign', 'Name', 'Format', 'Owner', 'Target city/ market', 'City of license']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['88.3 FM', 'KLMP', 'The Light', 'Christian', 'Bethesda Christian Broadcasting', 'Rapid City', 'Rapid City']
SQL:

assistant: SELECT "Frequency" FROM "Table" WHERE "Format" = 'Classic Country KRKI-FM booster';