user: Question: What time that is Networked has an ad freq of 20 Minutes until 7pm?
Columns: ['Time', 'Show Name', "DJ's", 'Local/Networked', 'Ad Freq', 'News Freq']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['5am-9:00am', 'Sarah and Dwayne For Breakfast', 'Sarah and Dwayne', 'Local', '15 Minutes', '30 Minutes']
SQL:

assistant: SELECT "Time" FROM "Table" WHERE "Local/Networked" = 'Networked' AND "Ad Freq" = '20 Minutes until 7pm';