let 's see , a haunted house , a haunted ship , what 's next 
(ROOT (S (S (VP (VB let) (S (NP (PRP 's)) (VP (VB see))))) (, ,) (NP (DT a) (VBN haunted) (NN house)) (, ,) (NP (DT a) (VBN haunted) (NN ship)) (, ,) (SBAR (WHNP (WP what)) (S (VP (VBZ 's) (ADVP (JJ next)))))))
(ROOT (S (S (VP (VB ) (S (NP (PRP )) (VP (VB ))))) (, ) (NP (DT ) (VBN ) (NN )) (, ) (NP (DT ) (VBN ) (NN )) (, ) (SBAR (WHNP (WP )) (S (VP (VBZ ) (ADVP (JJ )))))))