Question: What constructor has a grid less than 21, and time/retired of Engine?
SQL: SELECT "Constructor" FROM "2-18414537-2" WHERE "Grid" < 21.0 AND "Time/Retired" = 'Engine';

Question: When the entrant is Fred Saunders what is the driver?
SQL: SELECT "Driver" FROM "2-18414537-2" WHERE "Entrant" = 'Fred Saunders';

Question: What's the lowest grid with and entrant of Fred Saunders?
SQL: SELECT MIN("Grid") FROM "2-18414537-2" WHERE "Entrant" = 'Fred Saunders';

Question: What is the time/retired for the driver Emerson Fittipaldi?
SQL: SELECT "Time/Retired" FROM "2-18414537-2" WHERE "Driver" = 'Emerson Fittipaldi';