What is the Lap Length of the race with a Grand Prix Fia Category?
CREATE TABLE table_name_50 (lap_length VARCHAR, category VARCHAR)
SELECT lap_length FROM table_name_50 WHERE category = "grand prix fia"
### Context: CREATE TABLE table_name_50 (lap_length VARCHAR, category VARCHAR) ### Question: What is the Lap Length of the race with a Grand Prix Fia Category? ### Answer: SELECT lap_length FROM table_name_50 WHERE category = "grand prix fia"