( ( A geyser ) ( ( is ( ( a ( hot spring ) ) ( of ( water ( superheated ( by magma ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (NN geyser)) (VP (VBZ is) (NP (NP (DT a) (JJ hot) (NN spring)) (PP (IN of) (NP (NP (NN water)) (VP (VBN superheated) (PP (IN by) (NP (NN magma)))))))) (. .)))
A geyser is a hot spring of water superheated by magma.
(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)) (. .)))