CREATE TABLE table_78854 ("Rank" FLOAT, "Mountain Peak" TEXT, "Subrange" TEXT, "Elevation" TEXT, "Prominence" TEXT, "Isolation" TEXT)

Name the Prominence of the Mountain Peak of matchless mountain pb?
SELECT "Prominence" FROM table_78854 WHERE "Mountain Peak" = 'matchless mountain pb'
SELECT "Prominence" FROM "table_78854" WHERE "Mountain Peak" = 'matchless mountain pb'