Table: radio_schedule
Columns: time
show_name
local_networked
ad_freq
news_freq

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?
SQL: SELECT "time" FROM radio_schedule WHERE "local_networked" = 'local' AND "ad_freq" = '20 minutes' AND "news_freq" = 'n/a after 7pm news'

Question: Which time has a news frequency of 1 hour and show name of Best Mix Overnight?
SQL: SELECT "time" FROM radio_schedule WHERE "news_freq" = '1 hour' AND "show_name" = 'best mix overnight'

Question: What is the ad frequency for the show named Health Matters?
SQL: SELECT "ad_freq" FROM radio_schedule WHERE "show_name" = 'health matters'

Question: What is the news frequency for the show Locker Room?
SQL: SELECT "news_freq" FROM radio_schedule WHERE "show_name" = 'locker room'

Question: What is the local/networked value for the show with an ad frequency of N/A?
SQL: SELECT "local_networked" FROM radio_schedule WHERE "ad_freq" = 'n/a'