CREATE TABLE table_8991 ("Round" FLOAT, "Pick" FLOAT, "Overall" FLOAT, "Name" TEXT, "Position" TEXT, "College" TEXT)

What is the sum number of round with Nebraska as the college and the overall greater than 40?
SELECT COUNT("Round") FROM table_8991 WHERE "College" = 'nebraska' AND "Overall" > '40'
SELECT COUNT("Round") FROM "table_8991" WHERE "College" = 'nebraska' AND "Overall" > '40'