Question: What is the length and duration of the race on April 19?
SQL: SELECT "Length/Duration" FROM "2-14387459-1" WHERE "Date" = 'April 19';

Question: What was the circuit had a race on September 20.
SQL: SELECT "Circuit" FROM "2-14387459-1" WHERE "Date" = 'September 20';

Question: What was the date of the race that lasted 6 Hours?
SQL: SELECT "Date" FROM "2-14387459-1" WHERE "Length/Duration" = '6 Hours';

Question: What are the classes for the circuit that has the Mazda Raceway Laguna Seca race.
SQL: SELECT "Class(es)" FROM "2-14387459-1" WHERE "Circuit" = 'Mazda Raceway Laguna Seca';