( ( To ( such determinations ) ) ( ( ( must ( be added ) ) ( ( the heat ) ( lost ( from ( ( ( ( ( hot springs ) , ) geysers ) and ) ( other ( surface features ) ) ) ) ) ) ) . ) )
(ROOT (SINV (PP (TO To) (NP (JJ such) (NNS determinations))) (VP (MD must) (VP (VB be) (VP (VBN added)))) (NP (NP (DT the) (NN heat)) (VP (VBN lost) (PP (IN from) (NP (NP (JJ hot) (NNS springs)) (, ,) (NP (NNS geysers)) (CC and) (NP (JJ other) (NN surface) (NNS features)))))) (. .)))
To such determinations must be added the heat lost from hot springs, geysers and other surface features.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NN magma)) (VP (VBZ heats) (NP (NN groundwater))))) (, ,) (NP (PRP it)) (VP (MD may) (VP (VB come) (PP (TO to) (NP (NP (DT the) (NN surface)) (PP (IN as) (NP (NP (DT a) (JJ hot) (NN spring)) (CC or) (NP (DT a) (NN geyser)))))))) (. .)))