Complex sentence: There is only one U.S. Route in Essex County, U.S. Route 9, which continues for in two segments.The first, spanning, enters from Warren County near Schroon Lake and the second, spanning, stretches from both lines of Clinton County.
Split into simpler sentences: There is only one U.S. Route in Essex County, U.S. Route 9, which exists for in two segments. The second, spanning, stretches from both lines of Clinton County.