( ( If ( ( the aquifers ) ( are ( ( shallow or ) ( ( porous enough ) ( to ( ( allow water ) ( to ( ( move freely ) ( through it ) ) ) ) ) ) ) ) ) ) ( , ( people ( ( can ( ( ( ( drill wells ) ( into ( the aquifer ) ) ) and ) ( use ( ( the water ) ( for ( their purposes ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (DT the) (NNS aquifers)) (VP (VBP are) (ADJP (ADJP (JJ shallow)) (CC or) (ADJP (JJ porous) (RB enough) (S (VP (TO to) (VP (VB allow) (NP (NN water)) (S (VP (TO to) (VP (VB move) (ADVP (RB freely)) (PP (IN through) (NP (PRP it)))))))))))))) (, ,) (NP (NNS people)) (VP (MD can) (VP (VP (VB drill) (NP (NNS wells)) (PP (IN into) (NP (DT the) (NN aquifer)))) (CC and) (VP (VB use) (NP (NP (DT the) (NN water)) (PP (IN for) (NP (PRP$ their) (NNS purposes))))))) (. .)))
If the aquifers are shallow or porous enough to allow water to move freely through it, people can drill wells into the aquifer and use the water for their purposes.
(ROOT (S (NP (NNP Dig) (NNP a)) (ADVP (RB well)) (VP (VBZ allows) (S (NP (NNS people)) (VP (TO to) (VP (VB access) (NP (NN water)) (PP (IN in) (NP (NP (DT an) (NN aquifer)) (SBAR (WHNP (WDT that)) (S (VP (VBZ does) (RB not) (VP (VB flow) (PP (IN from) (NP (NP (DT a) (NN spring)) (CC or) (NP (DT a) (NN geyser)))))))))))))) (. .)))