Question: What was the GTP winning team in the round in Portland during which Jack Baldwin become part of the GTU winning team? 
SQL: SELECT "GTP Winning Team" FROM "1-13643320-2" WHERE "Circuit" = 'Portland' AND "GTU Winning Team" = 'Jack Baldwin';

Question: What us the number of the round during which #56 Blue Thunder Racing become the GTP winning team and #38 Mandeville Auto Tech became the GTO winning team? 
SQL: SELECT "Rnd" FROM "1-13643320-2" WHERE "GTP Winning Team" = '#56 Blue Thunder Racing' AND "GTO Winning Team" = '#38 Mandeville Auto Tech';

Question: How many different results came out of the round in which #98 All American Racers became the GTU winning team? 
SQL: SELECT COUNT("Results") FROM "1-13643320-2" WHERE "GTU Winning Team" = '#98 All American Racers';

Question: Who was the GTO winner of the round that ended with Chris Cord becoming the GTU winner? 
SQL: SELECT "GTO Winning Team" FROM "1-13643320-2" WHERE "GTU Winning Team" = 'Chris Cord';