CREATE TABLE table_39253 ("Rank" FLOAT, "Town" TEXT, "Population" FLOAT, "Year" FLOAT, "Borough" TEXT, "Definition" TEXT)

Which Definition has a Rank smaller than 12, and a Town of tadcaster?
SELECT "Definition" FROM table_39253 WHERE "Rank" < '12' AND "Town" = 'tadcaster'
SELECT "Definition" FROM "table_39253" WHERE "Rank" < '12' AND "Town" = 'tadcaster'