it 's so successful at lodging itself in the brain 
(ROOT (S (NP (PRP it)) (VP (VBZ 's) (ADJP (RB so) (JJ successful) (PP (IN at) (S (VP (VBG lodging) (NP (PRP itself)) (PP (IN in) (NP (DT the) (NN brain))))))))))
(ROOT (S (NP (PRP )) (VP (VBZ ) (ADJP (RB ) (JJ ) (PP (IN ) (S (VP (VBG ) (NP (PRP )) (PP (IN ) (NP (DT ) (NN ))))))))))