What engine did the mclaren mp4-20 use?
CREATE TABLE table_name_40 (engine VARCHAR, chassis VARCHAR)
SELECT engine FROM table_name_40 WHERE chassis = "mclaren mp4-20"
### Context: CREATE TABLE table_name_40 (engine VARCHAR, chassis VARCHAR) ### Question: What engine did the mclaren mp4-20 use? ### Answer: SELECT engine FROM table_name_40 WHERE chassis = "mclaren mp4-20"