at times it 's simply baffling 
(ROOT (S (PP (IN at) (NP (NNS times))) (NP (PRP it)) (VP (VBZ 's) (ADVP (RB simply)) (JJ baffling))))
(ROOT (S (PP (IN ) (NP (NNS ))) (NP (PRP )) (VP (VBZ ) (ADVP (RB )) (JJ ))))