for whom she shows little understanding 
(ROOT (SBAR (WHPP (IN for) (WHNP (WP whom))) (S (NP (PRP she)) (VP (VBZ shows) (NP (JJ little) (NN understanding))))))
(ROOT (SBAR (WHPP (IN ) (WHNP (WP ))) (S (NP (PRP )) (VP (VBZ ) (NP (JJ ) (NN ))))))