CREATE TABLE table_4255 ("Name" TEXT, "Family name" TEXT, "Receptor" TEXT, "Coreceptor" TEXT, "Property" TEXT, "Chromosomal location" TEXT)

How many different chromosomal locations are there in the family il-1f8?
SELECT COUNT("Chromosomal location") FROM table_4255 WHERE "Family name" = 'IL-1F8'
SELECT COUNT("Chromosomal location") FROM "table_4255" WHERE "Family name" = 'IL-1F8'