like leafing through an album of photos accompanied by the sketchiest of captions . 
(ROOT (PP (IN like) (S (VP (VBG leafing) (PP (IN through) (NP (NP (NP (DT an) (NN album)) (PP (IN of) (NP (NNS photos)))) (VP (VBN accompanied) (PP (IN by) (NP (NP (DT the) (NN sketchiest)) (PP (IN of) (NP (NNS captions)))))))))) (. .)))
(ROOT (PP (IN ) (S (VP (VBG ) (PP (IN ) (NP (NP (NP (DT ) (NN )) (PP (IN ) (NP (NNS )))) (VP (VBN ) (PP (IN ) (NP (NP (DT ) (NN )) (PP (IN ) (NP (NNS )))))))))) (. )))