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