(S (S (BASENP (DT The) (NN data)) (VP (VBZ suggests) (SBAR (S (NP (NP (BASENP (DT a) (NN layer)) (PP (IN of) (BASENP (NN water)))) (PP (IN between) (NP (NP (BASENP (DT the) (NN moon) (POS 's)) (BASENP (JJ rocky) (NN core))) (CC and) (BASENP (PRPD its) (JJ icy) (NN mantle))))) (COMMA ,) (VP (ADJP (ADJP (RB possibly) (ADJP (RB as) (JJ deep))) (PP (IN as) (NP (NP (BASENP (QP (RB about) (NN 50)) (NNS miles)) (PRN (LRB -LRB-) (BASENP (NN 80) (NNS kilometers)) (RRB -RRB-))) (PP (IN beneath) (BASENP (DT the) (NN surface))))))))))) (PERIOD .))