CREATE TABLE table_47802 ("Round" FLOAT, "Pick" FLOAT, "Overall" FLOAT, "Name" TEXT, "Position" TEXT, "College" TEXT)

What is the maximum pick when WR was the position and Michigan the college, and the overall greater than 255?
SELECT MAX("Pick") FROM table_47802 WHERE "Position" = 'wr' AND "College" = 'michigan' AND "Overall" > '255'
SELECT MAX("Pick") FROM "table_47802" WHERE "College" = 'michigan' AND "Overall" > '255' AND "Position" = 'wr'