( ( On ( the ( other hand ) ) ) ( , ( ( if ( groundwater ( becomes ( heated ( by ( ( a ( magma reservoir ) ) ( in ( the crust ) ) ) ) ) ) ) ) ( , ( it ( ( will ( ( ( become superheated ) and ) ( ` ( ( erupt ' ) ( at ( ( the surface ) ( as ( a geyser ) ) ) ) ) ) ) ) . ) ) ) ) ) )
(ROOT (S (PP (IN On) (NP (DT the) (JJ other) (NN hand))) (, ,) (SBAR (IN if) (S (NP (NN groundwater)) (VP (VBZ becomes) (ADJP (JJ heated) (PP (IN by) (NP (NP (DT a) (NN magma) (NN reservoir)) (PP (IN in) (NP (DT the) (NN crust))))))))) (, ,) (NP (PRP it)) (VP (MD will) (VP (VP (VB become) (ADJP (JJ superheated))) (CC and) (VP (`` `) (VB erupt) ('' ') (PP (IN at) (NP (NP (DT the) (NN surface)) (PP (IN as) (NP (DT a) (NN geyser)))))))) (. .)))
On the other hand, if groundwater becomes heated by a magma reservoir in the crust, it will become superheated and 'erupt' at the surface as a geyser .
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NN water)) (VP (VP (VBZ is) (VP (VP (VBN heated) (PP (IN by) (NP (NN magma)))) (CC and) (VP (VBZ makes) (NP (PRP$ its) (NN way)) (PP (TO to) (NP (DT the) (NN surface)))))) (CC and) (VP (VBZ creates))))) (NP (DT a) (-LRB- -LRB-) (NN n) (-RRB- -RRB-)) (VP (VBP geyser)) (. .)))