know about rubbo 's dumbed-down tactics 
(ROOT (S (VP (VB know) (PP (IN about) (NP (NP (NN rubbo) (POS 's)) (ADJP (VBN dumbed) (HYPH -) (RP down)) (NNS tactics))))))
(ROOT (S (VP (VB ) (PP (IN ) (NP (NP (NN ) (POS )) (ADJP (VBN ) (HYPH ) (RP )) (NNS ))))))