CREATE TABLE table_12145 ("Year" FLOAT, "Title" TEXT, "Format/genre" TEXT, "Role" TEXT, "Staged by" TEXT)

What is the role in an original play, comedy in 1938?
SELECT "Role" FROM table_12145 WHERE "Format/genre" = 'original play, comedy' AND "Year" = '1938'
SELECT "Role" FROM "table_12145" WHERE "Format/genre" = 'original play, comedy' AND "Year" = '1938'