the skills of a calculus major at m.i.t. 
(ROOT (NP (NP (DT the) (NNS skills)) (PP (IN of) (NP (NP (DT a) (NN calculus) (NN major)) (PP (IN at) (NP (NN m.i.t))))) (. .)))
(ROOT (NP (NP (DT ) (NNS )) (PP (IN ) (NP (NP (DT ) (NN ) (NN )) (PP (IN ) (NP (NN ))))) (. )))