CREATE TABLE table_1087 ("Call sign" CLOB, "Launched" CLOB, "Transmitting from" CLOB, "Coverage" CLOB, "Languages" CLOB, "Frequency" CLOB)

What frequency does Chihuahua Sinaloa Durango cover?
SELECT "Frequency" FROM table_1087 WHERE "Coverage" = 'Chihuahua Sinaloa Durango'
SELECT "Frequency" FROM "table_1087" WHERE "Coverage" = 'Chihuahua Sinaloa Durango'