CREATE TABLE table_78601 ("Year" FLOAT, "Competition" CLOB, "Venue" CLOB, "Position" CLOB, "Event" CLOB, "Time" FLOAT)

What is the greatest Time with a Year of 1991, and Event of 4x100 m relay?
SELECT MAX("Time") FROM table_78601 WHERE "Year" = '1991' AND "Event" = '4x100 m relay'
SELECT MAX("Time") FROM "table_78601" WHERE "Event" = '4x100 m relay' AND "Year" = '1991'