(QTL (DQL ``) (QTC (S (BASENP (DT A) (ADJP (RB completely) (JJ unexpected)) (NN surprise)) (VP (VBZ is) (SBAR (IN that) (S (NP (NP (BASENP (DT the) (NN chemistry)) (PP (IN of) (BASENP (NNP Enceladus)))) (PRN (COMMA ,) (SBAR (WHNP (WP what)) (S (VP (VBZ 's) (VP (VP (VBG coming) (PRT (RP out))) (PP (IN from) (ADVP (RB inside))))))) (COMMA ,))) (VP (VBZ resembles) (NP (BASENP (DT that)) (PP (IN of) (BASENP (DT a) (NN comet))))))))) (PERIOD .)))