Complex sentence: Lean finely textured beef, called by the epithet "pink slime", is a U.S. beef-based product that is added to ground beef as a filler or to reduce the overall fat content of ground beef.
Split into simpler sentences: Lean finely textured beef, called by the epithet "pink slime", is a beef-based product that is added to ground beef as a filler. The product is used as a filler or to reduce the overall fat content of ground beef.