Simplify the following text for a Grade 9 native English-speaking person.
Original: The Nemean lion ( Greek , Î Î Ï Î 1\/2 Ï Î Ï Î Î Î 1\/4 Î Î Ï ( LÃ Å n tÄ `` s NemÃ as ) ; Latin : Leo Nemaeus ) was a vicious monster in Greek mythology that lived at Nemea .
Simplified: The Nemean lion ( Greek , Î Î Ï Î 1\/2 Ï Î Ï Î Î Î 1\/4 Î Î Ï ( LÃ Å n tÄ `` s NemÃ as ) ; ) was a vicious monster in Greek mythology that lived at Nemea .