CREATE TABLE table_4490 ("Region" CLOB, "Operator" CLOB, "Licence award date" CLOB, "On air date" CLOB, "Closure date" CLOB)

What is the operator of the ensemble from Yorkshire?
SELECT "Operator" FROM table_4490 WHERE "Region" = 'yorkshire'
SELECT "Operator" FROM "table_4490" WHERE "Region" = 'yorkshire'