CREATE TABLE table_63538 ("Model number" CLOB, "sSpec number" CLOB, "Frequency" CLOB, "Turbo" CLOB, "Cores" FLOAT, "L2 cache" CLOB, "L3 cache" CLOB, "I/O bus" CLOB, "Mult." CLOB, "Memory" CLOB, "Voltage" CLOB, "Socket" CLOB, "Release date" CLOB, "Part number ( s ) " CLOB, "Release price  (  USD  ) " CLOB)

What is the release date of the 6 mb L3 cache with the part number by80607005259aabx80607i7740qm?
SELECT "Release date" FROM table_63538 WHERE "L3 cache" = '6 mb' AND "Part number(s)" = 'by80607005259aabx80607i7740qm'
SELECT "Release date" FROM "table_63538" WHERE "L3 cache" = '6 mb' AND "Part number(s)" = 'by80607005259aabx80607i7740qm'