Complex sentence: The southern terminus of NH 121A is at the Massachusetts state line in Plaistow, where the road continues for approximately 87 yards (80 m) into Massachusetts before ending at Route 125, a continuation of New Hampshire Route 125 in Haverhill.
Split into simpler sentences: The southern terminus of NH-121A is at the Massachusetts state line in Plaistow. The road continues for approximately 87 yards (80 m) into Massachusetts and then ends at the junction with Route 125, which is a continuation of NH-125 in Haverhill.