The parser generates a structural description of the sentence in the form of a labelled bracketing, which represents a tree-structured hierarchy with labels on the nodes of the tree.
(S (N'' (DET the) (N' (A' (A big)) (N' (A' (A big)) (N' (A' (A white)) (N' (N dog))) (V'' (V' (ADV obviously) (V' (V saw)) (N'' (DET a) (N' (A' (ADD very) (A' (A black)) (N' (N cat)))))