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_90 ( year VARCHAR, nation_of_citizenship VARCHAR, type_of_vehicle VARCHAR, racing_series VARCHAR )

### Question ###
What year has the vehicle of open wheel and a racing series of formula one with a Nation of citizenship in Germany.

### Accurate SQL ###

SELECT year FROM table_name_90 WHERE type_of_vehicle = "open wheel" AND racing_series = "formula one" AND nation_of_citizenship = "germany"