( ( As ( precipitation ( falls ( towards ( the earth ) ) ) ) ) ( , ( ( some ( of ( the water ) ) ) ( ( seeps ( into ( ( ( the ground ) , ) ( ( a process ) ( known ( as infiltration ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN As) (S (NP (NN precipitation)) (VP (VBZ falls) (PP (IN towards) (NP (DT the) (NN earth)))))) (, ,) (NP (NP (DT some)) (PP (IN of) (NP (DT the) (NN water)))) (VP (VBZ seeps) (PP (IN into) (NP (NP (DT the) (NN ground)) (, ,) (NP (NP (DT a) (NN process)) (VP (VBN known) (PP (IN as) (NP (NN infiltration)))))))) (. .)))
As precipitation falls towards the earth, some of the water seeps into the ground, a process known as infiltration.
(ROOT (S (NP (NP (NNP Water)) (VP (VBG seeping) (PP (IN into) (NP (DT the) (NN ground))))) (VP (VBZ is) (VP (VBN known) (PP (IN as) (NP (NN infiltration))))) (. .)))