CREATE TABLE table_856 ("Rnd" FLOAT, "Circuit" TEXT, "GTP Winning Team" TEXT, "GTO Winning Team" TEXT, "GTU Winning Team" TEXT, "Results" TEXT)

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?
SELECT "Rnd" FROM table_856 WHERE "GTP Winning Team" = '#56 Blue Thunder Racing' AND "GTO Winning Team" = '#38 Mandeville Auto Tech'
SELECT "Rnd" FROM "table_856" WHERE "GTO Winning Team" = '#38 Mandeville Auto Tech' AND "GTP Winning Team" = '#56 Blue Thunder Racing'