( ( The problem ) ( ( is ( that ( ( safe yield ) ( ignores ( ( the ( complex relationships ) ) ( between ( ( ( ( surface water ) ( -LRB- ( ( ( ( ( ( ( ( lakes , ) streams ) , ) springs ) , ) and ) marshes ) -RRB- ) ) ) and ) ( groundwater ( -LRB- ( ( water ( found ( in ( ( underground ( rock formations ) ) ( called aquifers ) ) ) ) ) -RRB- ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN problem)) (VP (VBZ is) (SBAR (IN that) (S (NP (JJ safe) (NN yield)) (VP (VBZ ignores) (NP (NP (DT the) (JJ complex) (NNS relationships)) (PP (IN between) (NP (NP (NP (NN surface) (NN water)) (PRN (-LRB- -LRB-) (NP (NP (NNS lakes)) (, ,) (NP (NNP streams)) (, ,) (NP (NNS springs)) (, ,) (CC and) (NP (NNS marshes))) (-RRB- -RRB-))) (CC and) (NP (NP (NN groundwater)) (PRN (-LRB- -LRB-) (NP (NP (NN water)) (VP (VBN found) (PP (IN in) (NP (NP (JJ underground) (NN rock) (NNS formations)) (VP (VBN called) (NP (NNS aquifers))))))) (-RRB- -RRB-)))))))))) (. .)))
The problem is that safe yield ignores the complex relationships between surface water (lakes, streams, springs, and marshes) and groundwater (water found in underground rock formations called aquifers).
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (NN water)) (SBAR (WHNP (WDT that)) (S (VP (VBZ flows) (PRT (RP out)) (PP (IN of) (NP (NP (DT the) (NN ground)) (SBAR (WHADVP (WRB where)) (S (NP (DT an) (NN aquifer)) (VP (VBZ meets) (S (NP (DT the) (NN surface)) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN spring))))))))))))) (. .)))
You call water that flows out of the ground where an aquifer meets the surface a(n) spring.