is like seeing a series of perfect black pearls clicking together to form a string . 
(ROOT (S (VP (VBZ is) (PP (IN like) (S (VP (VBG seeing) (S (NP (NP (DT a) (NN series)) (PP (IN of) (NP (JJ perfect) (JJ black) (NNS pearls)))) (VP (VBG clicking) (ADVP (RB together)) (S (VP (TO to) (VP (VB form) (NP (DT a) (NN string))))))))))) (. .)))
(ROOT (S (VP (VBZ ) (PP (IN ) (S (VP (VBG ) (S (NP (NP (DT ) (NN )) (PP (IN ) (NP (JJ ) (JJ ) (NNS )))) (VP (VBG ) (ADVP (RB )) (S (VP (TO ) (VP (VB ) (NP (DT ) (NN ))))))))))) (. )))