Complex sentence: The Alpe della Luna ("of the Moon") is a mountain massif in the northern Apennines, central Italy, situated acrosse the boundaries of Tuscany, Marche and Umbria.
Split into simpler sentences: The Alpe della Luna ("of the Moon") is a mountain massif in the northern Apennines of central Italy. It is situated across the boundaries of Tuscany, Marche and Umbria.