Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
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.
### Answer:
SELECT year FROM table_name_90 WHERE type_of_vehicle = "open wheel" AND racing_series = "formula one" AND nation_of_citizenship = "germany"