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_name_12 ( year VARCHAR, runner_up VARCHAR, winner VARCHAR, venue VARCHAR )

### Question ###
When is the winner olympiacos, the venue is georgios karaiskakis stadium and the runner-up is iraklis?

### Accurate SQL ###

SELECT year FROM table_name_12 WHERE winner = "olympiacos" AND venue = "georgios karaiskakis stadium" AND runner_up = "iraklis"