user: 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? 
Columns: ['Rnd', 'Circuit', 'GTP Winning Team', 'GTO Winning Team', 'GTU Winning Team', 'Results']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Daytona', '#00 Kreepy Krauly Racing', '#4 Stratagraph Inc.', '#76 Malibu Grand Prix', 'Results']
SQL:

assistant: SELECT "Rnd" FROM "Table" WHERE "GTP Winning Team" = '#56 Blue Thunder Racing' AND "GTO Winning Team" = '#38 Mandeville Auto Tech';