CREATE TABLE table_73000 ("Round" FLOAT, "Date" TEXT, "Grand Prix" TEXT, "Circuit" TEXT, "Pole Position" TEXT, "Fastest Lap" TEXT, "Race Winner" TEXT)

What grand prixs did Daijiro Hiura win?
SELECT "Grand Prix" FROM table_73000 WHERE "Race Winner" = 'Daijiro Hiura'
SELECT "Grand Prix" FROM "table_73000" WHERE "Race Winner" = 'Daijiro Hiura'