( There ( presently ( ( exist ( about ( ( ( twelve ( different features ) ) , ) ( such ( as ( ( ( ( ( ( ( ( the size ) ( of ( the watermarks ) ) ) , ) ( ( their position ) ( on ( the paper ) ) ) ) , ) ( ( the distance ) ( between ( two ( chain lines ) ) ) ) ) , ) ( ( ( the position ) ( of ( the regions ) ) ) ( that ( define ( ( ( the watermarks ) , ) etc. ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (EX There)) (ADVP (RB presently)) (VP (VBP exist) (PP (IN about) (NP (NP (CD twelve) (JJ different) (NNS features)) (, ,) (PP (JJ such) (IN as) (NP (NP (NP (DT the) (NN size)) (PP (IN of) (NP (DT the) (NNS watermarks)))) (, ,) (NP (NP (PRP$ their) (NN position)) (PP (IN on) (NP (DT the) (NN paper)))) (, ,) (NP (NP (DT the) (NN distance)) (PP (IN between) (NP (CD two) (NN chain) (NNS lines)))) (, ,) (NP (NP (DT the) (NN position)) (PP (IN of) (NP (DT the) (NNS regions))) (SBAR (WHNP (WDT that)) (S (VP (VB define) (NP (NP (DT the) (NNS watermarks)) (, ,) (NP (FW etc.)))))))))))) (. .)))
There presently exist about twelve different features, such as the size of the watermarks, their position on the paper, the distance between two chain lines,  the position of the regions that define the watermarks, etc.
(ROOT (S (NP (NNP Distance)) (VP (VBZ is) (VP (VBN defined) (PP (IN as) (NP (NP (DT the) (NN magnitude) (CC or) (NN size)) (PP (IN of) (NP (NP (NN displacement)) (PP (IN between) (NP (CD two) (NNS positions))))))))) (. .)))