CREATE TABLE table_51851 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

What is the Time/Retired that has a Grid smaller than 8, 73 laps, and a Constructor of williams - bmw?
SELECT "Time/Retired" FROM table_51851 WHERE "Grid" < '8' AND "Laps" = '73' AND "Constructor" = 'williams - bmw'
SELECT "Time/Retired" FROM "table_51851" WHERE "Constructor" = 'williams - bmw' AND "Grid" < '8' AND "Laps" = '73'