CREATE TABLE table_64871 ("Rank" TEXT, "Name" TEXT, "Country" TEXT, "Maglia Rosa" FLOAT, "Giro Wins" FLOAT, "Points" FLOAT, "Young rider" FLOAT)

what is the least maglia rosa when the rank is 108=, the country is united kingdom and young rider is less than 0?
SELECT MIN("Maglia Rosa") FROM table_64871 WHERE "Rank" = '108=' AND "Country" = 'united kingdom' AND "Young rider" < '0'
SELECT MIN("Maglia Rosa") FROM "table_64871" WHERE "Country" = 'united kingdom' AND "Rank" = '108=' AND "Young rider" < '0'