user: Question: what is the name of the branding where the virtual is 13.1
Columns: ['(Virtual)', 'Callsign', 'Affiliation', 'Branding', 'Channel', 'Programming', 'Owner']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['4.1', 'WNBC', 'NBC ( O&O )', '4 New York or NBC 4', '4.2', 'Cozi TV', 'NBCUniversal Licensee: NBC Telemundo License LLC']
SQL:

assistant: SELECT "Branding" FROM "Table" WHERE "(Virtual)" = '13.1';