CREATE TABLE table_22557 ("Date" FLOAT, "Single" TEXT, "Backed with" TEXT, "Record label" TEXT, "Format" TEXT, "Other details" TEXT)

What format for the release that had 2000 copies?
SELECT "Format" FROM table_22557 WHERE "Other details" = '2000 copies'
SELECT "Format" FROM "table_22557" WHERE "Other details" = '2000 copies'