ivan is a prince of a fellow 
(ROOT (S (NP (NNP ivan)) (VP (VBZ is) (NP (NP (DT a) (NN prince)) (PP (IN of) (NP (DT a) (NN fellow)))))))
(ROOT (S (NP (NNP )) (VP (VBZ ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (NN )))))))