Table: radio_stations_11
Columns: call_sign
frequency
city_of_license
watts
class

Question: How many Watts has a Class of a, and a Frequency of 91.5 fm, and a City of license of elkhart, kansas?
SQL: SELECT MIN("watts") FROM radio_stations_11 WHERE "class" = 'a' AND "frequency" = '91.5 fm' AND "city_of_license" = 'elkhart, kansas'

Question: Which Class has a City of license of garden city, kansas?
SQL: SELECT "class" FROM radio_stations_11 WHERE "city_of_license" = 'garden city, kansas'

Question: Which Frequency has a Call sign of kcse?
SQL: SELECT "frequency" FROM radio_stations_11 WHERE "call_sign" = 'kcse'