Complex sentence: In a cave near Nowy Targ (East-Gravettian culture) a 30,000 years old, world's oldest boomerang was found-a crescent-shaped 70 cm long object with fine finish, made of mammoth tusk.
Split into simpler sentences: In a cave near Nowy Targ (East-Gravettian culture), a 30,000 years old, world's oldest boomerang was found. It is a crescent-shaped 70 cm long object with fine finish, made of mammoth tusk.