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_12941 ( "White" text, "Black" text, "Year" real, "Result" text, "Moves" real, "Tournament" text, "Opening" text )

### Question ###
Which year had e34 Nimzo-Indian defence is the opening?

### Accurate SQL ###

SELECT "Year" FROM table_12941 WHERE "Opening" = 'e34 nimzo-indian defence'