harps on media-constructed ` issues ' 
(ROOT (NP (NP (NNS harps)) (PP (IN on) (NP (ADJP (NN media) (HYPH -) (VBN constructed)) (`` `) (NNS issues) ('' ')))))
(ROOT (NP (NP (NNS )) (PP (IN ) (NP (ADJP (NN ) (HYPH ) (VBN )) (`` ) (NNS ) ('' )))))