( ( by ( functioning ( in ( groundwater ( and ( surface ( water supply ) ) ) ) ) ) ) ; )
(ROOT (PP (IN by) (NP (NP (VBG functioning)) (PP (IN in) (NP (NN groundwater) (CC and) (NN surface) (NN water) (NN supply)))) (: ;)))
by functioning in groundwater and surface water supply;
(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)))) (. .)))