CREATE TABLE table_10733 ("Number Range" TEXT, "Introduced" TEXT, "Builder" TEXT, "Engine" TEXT, "Seats" TEXT, "Withdrawn" TEXT)

What is the number range for the Gloucester RCW builder introduced in 1937?
SELECT "Number Range" FROM table_10733 WHERE "Builder" = 'gloucester rcw' AND "Introduced" = '1937'
SELECT "Number Range" FROM "table_10733" WHERE "Builder" = 'gloucester rcw' AND "Introduced" = '1937'