CREATE TABLE table_71990 ("Rank" FLOAT, "Mountain Peak" TEXT, "Province" TEXT, "Mountain Range" TEXT, "Location" TEXT)

Which location includes Coast Mountains with a rank less than 18 at Skihist Mountain?
SELECT "Location" FROM table_71990 WHERE "Mountain Range" = 'coast mountains' AND "Rank" < '18' AND "Mountain Peak" = 'skihist mountain'
SELECT "Location" FROM "table_71990" WHERE "Mountain Peak" = 'skihist mountain' AND "Mountain Range" = 'coast mountains' AND "Rank" < '18'