strays past the two and a half mark 
(ROOT (S (VP (VBZ strays) (PP (IN past) (NP (DT the) (QP (CD two) (CC and) (DT a) (NN half)) (NN mark))))))
(ROOT (S (VP (VBZ ) (PP (IN ) (NP (DT ) (QP (CD ) (CC ) (DT ) (NN )) (NN ))))))