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_26267607_2 ( date VARCHAR, circuit VARCHAR, winning_team VARCHAR, pole_position VARCHAR )

### Question ###
On what date is the winning team Abt Sportsline and pole position Mattias Ekstr m in the Circuit Ricardo Tormo , Valencia?

### Accurate SQL ###

SELECT date FROM table_26267607_2 WHERE winning_team = "Abt Sportsline" AND pole_position = "Mattias Ekström" AND circuit = "circuit Ricardo Tormo , Valencia"