CREATE TABLE table_50744 ("Region" TEXT, "Date" TEXT, "Label" TEXT, "Format" TEXT, "Catalog" TEXT)

What is the Date of the RCA release with Catalog number SF-7635?
SELECT "Date" FROM table_50744 WHERE "Label" = 'rca' AND "Catalog" = 'sf-7635'
SELECT "Date" FROM "table_50744" WHERE "Catalog" = 'sf-7635' AND "Label" = 'rca'