Question: Which date was held at Laguna Seca Raceway, in class GTX/GTO?
SQL: SELECT "Date" FROM "2-13656998-1" WHERE "Circuit" = 'Laguna Seca Raceway' AND "Class" = 'GTX/GTO';

Question: Which circuit was held on May 7 for 1 Hour?
SQL: SELECT "Circuit" FROM "2-13656998-1" WHERE "Date" = 'May 7' AND "Length" = '1 Hour';

Question: Which circuit has a length of 45 Minutes and is held on August 6?
SQL: SELECT "Circuit" FROM "2-13656998-1" WHERE "Length" = '45 Minutes' AND "Date" = 'August 6';

Question: What is the length of the 6 Hours of Talladega?
SQL: SELECT "Length" FROM "2-13656998-1" WHERE "Race" = '6 Hours of Talladega';