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_56398 ( "Home team" text, "Home team score" text, "Away team" text, "Away team score" text, "Venue" text, "Crowd" real, "Date" text )

### Question ###
When did the game with North Melbourne as the away team take place?

### Accurate SQL ###

SELECT "Date" FROM table_56398 WHERE "Away team" = 'north melbourne'