Complex sentence: Route 120 is a short west-east state highway in Massachusetts which acts as an extension of Rhode Island Route 120 and U.S. Route 6 in North Attleboro, Massachusetts.
Split into simpler sentences: Route 120 is a short west-east state highway in Massachusetts which acts as an extension of Rhode Island Route 120. The highway ends at U.S. Route 6 in North Attleboro, Massachusetts.