(S (S (SBAR (IN If) (S (BASENP (DT the) (NNS plumes)) (VP (VBD emanated) (PP (IN from) (BASENP (NN ice)))))) (COMMA ,) (S (BASENP (PRP they)) (VP (MD should) (VP (VB have) (NP (BASENP (ADJP (RB very) (JJ little)) (NN salt)) (PP (IN in) (BASENP (PRP them)))))))) (PERIOD .))