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_16 (circuit VARCHAR, fastest_lap VARCHAR, race VARCHAR)
### Question:
What circuit did Juan Manuel Fangio have the fastest lap at the german grand prix?
### Answer:
SELECT circuit FROM table_name_16 WHERE fastest_lap = "juan manuel fangio" AND race = "german grand prix"