a thriller without thrills and a mystery devoid of urgent questions 
(ROOT (NP (NP (NP (DT a) (NN thriller)) (PP (IN without) (NP (NNS thrills)))) (CC and) (NP (NP (DT a) (NN mystery)) (ADJP (JJ devoid) (PP (IN of) (NP (JJ urgent) (NNS questions)))))))
(ROOT (NP (NP (NP (DT ) (NN )) (PP (IN ) (NP (NNS )))) (CC ) (NP (NP (DT ) (NN )) (ADJP (JJ ) (PP (IN ) (NP (JJ ) (NNS )))))))