like a can of 2-day old coke . 
(ROOT (PP (IN like) (NP (NP (DT a) (NN can)) (PP (IN of) (NP (ADJP (NP (CD 2) (HYPH -) (NN day)) (JJ old)) (NN coke)))) (. .)))
(ROOT (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (ADJP (NP (CD ) (HYPH ) (NN )) (JJ )) (NN )))) (. )))