CREATE TABLE table_35347 ("Round" FLOAT, "Pick #" FLOAT, "Overall" FLOAT, "Name" TEXT, "Position" TEXT, "College" TEXT)

Which Overall is the highest one that has a Name of gregory spann, and a Pick # larger than 19?
SELECT MAX("Overall") FROM table_35347 WHERE "Name" = 'gregory spann' AND "Pick #" > '19'
SELECT MAX("Overall") FROM "table_35347" WHERE "Name" = 'gregory spann' AND "Pick #" > '19'