Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_856 ( "Rnd" real, "Circuit" text, "GTP Winning Team" text, "GTO Winning Team" text, "GTU Winning Team" text, "Results" text )

### 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?

### Accurate SQL ###

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