with the ferocity of a frozen burrito 
(ROOT (PP (IN with) (NP (NP (DT the) (NN ferocity)) (PP (IN of) (NP (DT a) (VBN frozen) (NN burrito))))))
(ROOT (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (DT ) (VBN ) (NN ))))))