CREATE TABLE table_48600 ("Year" FLOAT, "Track" TEXT, "250 cc" TEXT, "500 cc" TEXT, "Report" TEXT)

What is the 250 cc with a year bigger than 1984?
SELECT "250 cc" FROM table_48600 WHERE "Year" > '1984'
SELECT "250 cc" FROM "table_48600" WHERE "Year" > '1984'