Table: race_results_50
Columns: year
start
qual
rank
finish
laps

Question: What's the lowest amount of laps with a start of 21?
SQL: SELECT MIN("laps") FROM race_results_50 WHERE "start" = '21'

Question: What was the start of the competitor with a qualifying time of 84.300?
SQL: SELECT "start" FROM race_results_50 WHERE "qual" = '84.300'

Question: In what year were there more laps than 200 in a race?
SQL: SELECT "year" FROM race_results_50 WHERE "laps" > 200