has n't escaped the rut dug by the last one 
(ROOT (S (VP (VBZ has) (RB n't) (VP (VBN escaped) (NP (NP (DT the) (NN rut)) (VP (VBN dug) (PP (IN by) (NP (DT the) (JJ last) (CD one)))))))))
(ROOT (S (VP (VBZ ) (RB ) (VP (VBN ) (NP (NP (DT ) (NN )) (VP (VBN ) (PP (IN ) (NP (DT ) (JJ ) (CD )))))))))