( ( ( Shallow ( Groundwaters ( and ( Precipitation Comparison ) ) ) ) ( of ( ( ( d 18 ) ( O values ) ) ( for ( groundwaters ( with ( precipitation ( on ( a ( regional scale ) ) ) ) ) ) ) ) ) ) ( ( shows ( ( the connection ) ( between ( ( groundwater and ) ( the ( meteoric ( input signal ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Shallow) (NNPS Groundwaters) (CC and) (NNP Precipitation) (NNP Comparison)) (PP (IN of) (NP (NP (QP (CD d) (CD 18)) (NNP O) (NNS values)) (PP (IN for) (NP (NP (NNS groundwaters)) (PP (IN with) (NP (NP (NN precipitation)) (PP (IN on) (NP (DT a) (JJ regional) (NN scale)))))))))) (VP (VBZ shows) (NP (NP (DT the) (NN connection)) (PP (IN between) (NP (NP (NN groundwater)) (CC and) (NP (DT the) (JJ meteoric) (NN input) (NN signal)))))) (. .)))
Shallow Groundwaters and Precipitation Comparison of d 18 O values for groundwaters with precipitation on a regional scale shows the connection between groundwater and the meteoric input signal.
(ROOT (S (NP (NNP Groundwater)) (ADVP (RB primarily)) (VP (VBZ comes) (PP (IN from) (NP (NN precipitation)))) (. .)))