CREATE TABLE table_11909 ("Model" CLOB, "Released" CLOB, "Form factor" CLOB, "Chipset" CLOB, "Memory Type" CLOB, "Max. Memory" CLOB)

Whas is the released date of the memory type ddr2-667?
SELECT "Released" FROM table_11909 WHERE "Memory Type" = 'ddr2-667'
SELECT "Released" FROM "table_11909" WHERE "Memory Type" = 'ddr2-667'