Table: grand_prix_1968
Columns: driver
constructor
laps
time_retired
grid

Question: What driver had under 22 laps and a Time/Retired of ignition?
SQL: SELECT "driver" FROM grand_prix_1968 WHERE "laps" < 22 AND "time_retired" = 'ignition'

Question: What is the highest number of laps for chris amon?
SQL: SELECT MAX("laps") FROM grand_prix_1968 WHERE "driver" = 'chris amon'