Complex sentence: Comprising a land area of, it is the second-largest nation in the Middle East and the 18th-largest in the world; with 78.4 million inhabitants, Iran is the world's 17th most populous nation.
Split into simpler sentences: Comprising a land area of, it is the second-largest nation in the Middle East and the 18th-largest in the world. With 78.4 million inhabitants, Iran is the world's 17th most populous nation.