that explore the seamy underbelly of the criminal world 
(ROOT (S (WHNP (DT that)) (VP (VB explore) (NP (NP (DT the) (JJ seamy) (NN underbelly)) (PP (IN of) (NP (DT the) (JJ criminal) (NN world)))))))
(ROOT (S (WHNP (DT )) (VP (VB ) (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (DT ) (JJ ) (NN )))))))