Sentence:  Prove that if a <WSD>Kleinian</WSD> group "G" does not contain parabolic elements and is isomorphic to the fundamental group of a closed orientable surface, then "G" is either quasi-Fuchsian or degenerate... 
Meaning of the word marked with <WSD> tags:  Of or pertaining to (Christian Felix Klein) (1849–1925), German mathematician.