(S (S (BASENP (DT The) (NN team)) (VP (VBZ calculates) (SBAR (S (S (BASENP (DT the) (NN water) (NNS reserves)) (VP (MD must) (VP (VB have) (BASENP (JJ large) (VBG evaporating) (NNS surfaces))))) (CONJP (COMMA ,) (CC or)) (S (BASENP (PRP they)) (VP (MD would) (VP (VP (VB freeze) (ADVP (RB easily))) (CC and) (VP (VB stop) (BASENP (DT the) (NNS plumes)))))))))) (PERIOD .))