user: Question: Name the official website which has dish of • and callsign of KVTV
Columns: ['Dish', 'Callsign', 'Network', 'Resolution', 'City of License', 'Official Website']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['•', 'XEFE', 'Televisa local', 'Analog', 'Nuevo Laredo', '•']
SQL:

assistant: SELECT "Official Website" FROM "Table" WHERE "Dish" = '•' AND "Callsign" = 'KVTV';