CREATE TABLE table_8711 ("Developer ( s ) " CLOB, "Release date" CLOB, "Required OS" CLOB, "Payment" CLOB, "Type" CLOB)

Which Release date has a Developer(s) of microsoft research?
SELECT "Release date" FROM table_8711 WHERE "Developer(s)" = 'microsoft research'
SELECT "Release date" FROM "table_8711" WHERE "Developer(s)" = 'microsoft research'