at how clever it 's being 
(ROOT (PP (IN at) (SBAR (WHADJP (WRB how) (JJ clever)) (S (NP (PRP it)) (VP (VBZ 's) (VP (VBG being)))))))
(ROOT (PP (IN ) (SBAR (WHADJP (WRB ) (JJ )) (S (NP (PRP )) (VP (VBZ ) (VP (VBG )))))))