CREATE TABLE table_203_476 (id NUMBER, "no." NUMBER, "title  ( latin ) " CLOB, "title  ( english translation ) " CLOB, "subject" CLOB, "date" CLOB)

what is the only subject on 23 may 1920 ?
SELECT "subject" FROM table_203_476 WHERE "date" = '23 may 1920'
SELECT "subject" FROM "table_203_476" WHERE "date" = '23 may 1920'