CREATE TABLE table_48369 ("Date of release" FLOAT, "Title" CLOB, "Label" CLOB, "Oricon peak" FLOAT, "RIAA cert." CLOB)

WHAT LABEL HAD A RELEASE DATE OF 1991?
SELECT "Label" FROM table_48369 WHERE "Date of release" = '1991'
SELECT "Label" FROM "table_48369" WHERE "Date of release" = '1991'