CREATE TABLE table_16726 ("Rnd" FLOAT, "Race" TEXT, "Date" TEXT, "Location" TEXT, "Pole Position" TEXT, "Fastest Lap" TEXT, "Race Winner" TEXT, "Constructor" TEXT, "Report" TEXT)

What is the constructor for 9 May?
SELECT "Constructor" FROM table_16726 WHERE "Date" = '9 May'
SELECT "Constructor" FROM "table_16726" WHERE "Date" = '9 May'