Table: radio_stations_19
Columns: call_sign
frequency_mhz
city_of_license
erp_w
class
fcc_info

Question: What is the total Frequency MHz Port Charlotte, Florida, which has an ERP W larger than 10, has?
SQL: SELECT COUNT("frequency_mhz") FROM radio_stations_19 WHERE "city_of_license" = 'port charlotte, florida' AND "erp_w" > 10

Question: What is the call sign for the translator with an ERP W larger than 10?
SQL: SELECT "call_sign" FROM radio_stations_19 WHERE "erp_w" > 10

Question: What is the highest ERP W of the translator with a call sign of w284av?
SQL: SELECT MAX("erp_w") FROM radio_stations_19 WHERE "call_sign" = 'w284av'