in the worst sense of the expression 
(ROOT (PP (IN in) (NP (NP (DT the) (JJS worst) (NN sense)) (PP (IN of) (NP (DT the) (NN expression))))))
(ROOT (PP (IN ) (NP (NP (DT ) (JJS ) (NN )) (PP (IN ) (NP (DT ) (NN ))))))