CREATE TABLE table_203_788 (id NUMBER, "year" NUMBER, "author" CLOB, "illustrator" CLOB, "title" CLOB, "publisher" CLOB)

how many number of titles are listed for the year 1991 ?
SELECT COUNT(DISTINCT "title") FROM table_203_788 WHERE "year" = 1991
SELECT COUNT(DISTINCT "title") FROM "table_203_788" WHERE "year" = 1991