user: Question: Which time has a Local/networked value of Local, ad frequency of every 20 Minutes, and news frequency of N/A After 7pm news?
Columns: ['Time', 'Show Name', 'Local/Networked', 'Ad Freq', 'News Freq']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['5am-7:00am-Saturdays', 'Widest Variety', 'Local', '10 Minutes', '30 Minutes']
SQL:

assistant: SELECT "Time" FROM "Table" WHERE "Local/Networked" = 'Local' AND "Ad Freq" = '20 Minutes' AND "News Freq" = 'N/A After 7pm news';