Table: race_results_2008_4
Columns: rider
manufacturer
laps
time
grid

Question: What is the lowest grid number for Yamaha?
SQL: SELECT MIN("grid") FROM race_results_2008_4 WHERE "manufacturer" = 'yamaha'

Question: How many laps had a grid over 16 and a Time of +1:35.890?
SQL: SELECT "laps" FROM race_results_2008_4 WHERE "grid" > 16 AND "time" = '+1:35.890'

Question: What was the lowest lab for Gilera with a grid less than 12?
SQL: SELECT MIN("laps") FROM race_results_2008_4 WHERE "manufacturer" = 'gilera' AND "grid" < 12

Question: What is the highest Grid with a time of +1:19.905, and less than 20 laps?
SQL: SELECT MAX("grid") FROM race_results_2008_4 WHERE "time" = '+1:19.905' AND "laps" < 20

Question: What Rider has a Grid of 21?
SQL: SELECT "rider" FROM race_results_2008_4 WHERE "grid" = 21