Table: radio_stations_18
Columns: freq
call
city
owner
day_power_w
night_power
format
stereo

Question: What is the WPW freq with a day power of 250?
SQL: SELECT SUM("freq") FROM radio_stations_18 WHERE "owner" = 'wpw' AND "day_power_w" > 250

Question: Is WPEO in stereo?
SQL: SELECT "stereo" FROM radio_stations_18 WHERE "call" = 'wpeo'