CREATE TABLE table_52607 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

What is nigel mansell's time/retired?
SELECT "Time/Retired" FROM table_52607 WHERE "Driver" = 'nigel mansell'
SELECT "Time/Retired" FROM "table_52607" WHERE "Driver" = 'nigel mansell'