CREATE TABLE table_37794 ("County" CLOB, "Irish name" CLOB, "County town" CLOB, "Most populous city/town" CLOB, "Province" CLOB, "Region" CLOB)

County town of castlebar has the most populous city/town?
SELECT "Most populous city/town" FROM table_37794 WHERE "County town" = 'castlebar'
SELECT "Most populous city/town" FROM "table_37794" WHERE "County town" = 'castlebar'