( ( ( ( ( This rock ) , ) ( called magma ) ) , ) ( ( furnishes ( ( the heat ) ( for ( ( the ( park 's ) ) ( geysers ( and ( hot springs ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT This) (NN rock)) (, ,) (VP (VBN called) (NP (NN magma))) (, ,)) (VP (VBZ furnishes) (NP (NP (DT the) (NN heat)) (PP (IN for) (NP (NP (DT the) (NN park) (POS 's)) (NNS geysers) (CC and) (JJ hot) (NNS springs))))) (. .)))
This rock, called magma, furnishes the heat for the park's geysers and hot springs.
(ROOT (S (NP (NP (DT The) (NN water)) (PP (IN in) (NP (DT some) (NNS springs)))) (VP (VBP are) (ADJP (JJ hot) (SBAR (IN because) (S (NP (PRP they)) (VP (VBP 're) (VP (VBN heated) (PP (IN by) (NP (JJ hot) (NN magma))))))))) (. .)))