the visual wit of the previous pictures 
(ROOT (NP (NP (DT the) (JJ visual) (NN wit)) (PP (IN of) (NP (DT the) (JJ previous) (NNS pictures)))))
(ROOT (NP (NP (DT ) (JJ ) (NN )) (PP (IN ) (NP (DT ) (JJ ) (NNS )))))