CREATE TABLE table_name_71 (state VARCHAR, frequency VARCHAR, city_of_license VARCHAR)

What state is the radio station in that has a frequency of 90.1 FM and a city license in New Castle?
SELECT state FROM table_name_71 WHERE frequency = "90.1 fm" AND city_of_license = "new castle"
SELECT "state" FROM "table_name_71" WHERE "90.1 fm" = "frequency" AND "city_of_license" = "new castle"