CREATE TABLE table_30531 ("Rnd" FLOAT, "Date" CLOB, "Circuit" CLOB, "Supporting" CLOB, "Distance" CLOB, "GT Winning Car" CLOB, "TC Winning Car" CLOB)

Who was supporting in the round when the gt winning car was dino crescentini?
SELECT "Supporting" FROM table_30531 WHERE "GT Winning Car" = 'Dino Crescentini'
SELECT "Supporting" FROM "table_30531" WHERE "GT Winning Car" = 'Dino Crescentini'