with the characters , who are so believable that you feel what they feel 
(ROOT (PP (IN with) (NP (NP (DT the) (NNS characters)) (, ,) (SBAR (WHNP (WP who)) (S (VP (VBP are) (ADJP (ADJP (RB so) (JJ believable)) (SBAR (IN that) (S (NP (PRP you)) (VP (VBP feel) (SBAR (WHNP (WP what)) (S (NP (PRP they)) (VP (VBP feel))))))))))))))
(ROOT (PP (IN ) (NP (NP (DT ) (NNS )) (, ) (SBAR (WHNP (WP )) (S (VP (VBP ) (ADJP (ADJP (RB ) (JJ )) (SBAR (IN ) (S (NP (PRP )) (VP (VBP ) (SBAR (WHNP (WP )) (S (NP (PRP )) (VP (VBP ))))))))))))))