Complex sentence: Gustavo Cisneros (born 1946) is a Venezuelan-born media mogul, and is among the world's richest men according to "Forbes" magazine, which estimates his fortune at $5 billion.
Split into simpler sentences: Gustavo Cisneros (b.1946) is a Venezuelan-born media mogul. He is among the world's richest men according to "Forbes" magazine, which estimates his fortune at $5 billion.