user: Question: When Portsmouth is the city of license who is the licensee?
Columns: ['Call sign', 'Frequency', 'City of License', 'Licensee', 'Format']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['WADK', '1540 AM', 'Newport', 'Astro Tele-Communications Corp.', 'News/Talk']
SQL:

assistant: SELECT "Licensee" FROM "Table" WHERE "City of License" = 'Portsmouth';