searching for a quarter in a giant pile of elephant feces 
(ROOT (S (VP (VBG searching) (PP (IN for) (NP (DT a) (NN quarter))) (PP (IN in) (NP (NP (DT a) (JJ giant) (NN pile)) (PP (IN of) (NP (NN elephant) (NNS feces))))))))
(ROOT (S (VP (VBG ) (PP (IN ) (NP (DT ) (NN ))) (PP (IN ) (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (NN ) (NNS ))))))))