user: Question: When DWHR-TV is the call sign how many station types are there?
Columns: ['Branding', 'Callsign', 'Ch. #', 'Power kW', 'Station Type', 'Location (Transmitter site)']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['IBC TV-13 Manila', 'DZTV-TV', 'TV-13', '50kW (1,500 kW ERP)', 'Originating', 'Metro Manila']
SQL:

assistant: SELECT COUNT("Station Type") FROM "Table" WHERE "Callsign" = 'DWHR-TV';