( ( ( Water inflow ) ( below ( ( the surface ) ( of ( ( the ground ) ( to ( a ( ( lake or ) river ) ) ) ) ) ) ) ) ( ( is ( called groundwater ) ) . ) )
(ROOT (S (NP (NP (NNP Water) (NNP inflow)) (PP (IN below) (NP (NP (DT the) (NN surface)) (PP (IN of) (NP (NP (DT the) (NN ground)) (PP (TO to) (NP (DT a) (NN lake) (CC or) (NN river)))))))) (VP (VBZ is) (VP (VBN called) (NP (NN groundwater)))) (. .)))
Water inflow below the surface of the ground to a lake or river is called groundwater .
(ROOT (S (SBAR (WHADVP (WRB When)) (S (S (NP (DT the) (NN ground)) (VP (VBZ absorbs) (NP (DT the) (NN water)))) (CC and) (S (NP (PRP it)) (VP (VBZ settles) (PP (IN below) (NP (DT the) (NN surface))))))) (NP (PRP it)) (VP (VBZ is) (VP (VBN called) (NP (NN groundwater)))) (. .)))