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_74809 ( "Year" real, "Driver" text, "Nation of citizenship" text, "Racing series" text, "Type of vehicle" text )

### 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_74809 WHERE "Type of vehicle" = 'open wheel' AND "Racing series" = 'formula one' AND "Nation of citizenship" = 'germany'