user: Question: What is the callsign of Tuguegarao
Columns: ['Branding', 'Callsign', 'Ch. #', 'Power (kW)', 'Station Type', 'Location (Transmitter site)']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['SMNI TV-39 Manila', 'DWBP-TV', 'TV-39', '50kW', 'Originating', 'Metro Manila']
SQL:

assistant: SELECT "Callsign" FROM "Table" WHERE "Location (Transmitter site)" = 'Tuguegarao';