CREATE TABLE table_14434 ("Date" TEXT, "Label" TEXT, "Region" TEXT, "Format" TEXT, "Catalog" TEXT)

What was the format in September 1990 for Catalog 887 847-1?
SELECT "Format" FROM table_14434 WHERE "Catalog" = '887 847-1' AND "Date" = 'september 1990'
SELECT "Format" FROM "table_14434" WHERE "Catalog" = '887 847-1' AND "Date" = 'september 1990'