Complex sentence: Eastern cougar ("Puma concolor couguar") is considered by many puma biologists to be a subspecies of the North American cougar, while others believe recent genetic research suggests all North American cougars are a single subspecies.
Split into simpler sentences: Eastern cougar ("Puma concolor couguar") is a type of Cougar. It is considered by many puma biologists to be a subspecies of the North American cougar, while others believe recent genetic research suggests all North American cougars are a single subspecies.