Complex sentence: The Shropshire Union Canal is a navigable canal in England; the Llangollen and Montgomery canals are the modern names of branches of the Shropshire Union ("SU") system and lie partially in Wales.
Split into simpler sentences: The Shropshire Union Canal is a navigable canal in England. The Llangollen and Montgomery canals are the modern names of branches of the Shropshire Union ("SU") system and lie partially in Wales.