CREATE TABLE table_5682 ("Gauge" CLOB, "Railway" CLOB, "Class" CLOB, "Works no." CLOB, "Year" CLOB, "Builder" CLOB)

Which railway has a class of 250 and year 1936?
SELECT "Railway" FROM table_5682 WHERE "Class" = '250' AND "Year" = '1936'
SELECT "Railway" FROM "table_5682" WHERE "Class" = '250' AND "Year" = '1936'