CREATE TABLE "table1_13643320_2" (
  "rnd" real,
  "circuit" text,
  "gtp_winning_team" text,
  "gto_winning_team" text,
  "gtu_winning_team" text,
  "results" text
);

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 "table1_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 "table1_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 "table1_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 "table1_13643320_2" WHERE "gtu_winning_team"='Chris Cord';