Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_14257 ( "Model number" text, "sSpec number" text, "Cores" real, "Frequency" text, "Turbo" text, "L2 cache" text, "L3 cache" text, "GPU model" text, "GPU frequency" text, "Socket" text, "I/O bus" text, "Release date" text, "Part number(s)" text, "Release price ( USD )" text )

### Question ###
what is the release date when the sspec number is sr15h(c0)?

### Accurate SQL ###

SELECT "Release date" FROM table_14257 WHERE "sSpec number" = 'sr15h(c0)'