(S (S (PP (IN From) (BASENP (DT this) (NN impact))) (COMMA ,) (S (BASENP (NNS scientists)) (VP (VBP hope) (S (VP (TO to) (VP (VB be) (ADJP (JJ able) (S (VP (TO to) (VP (VP (VB detect) (NP (DT any) (NP (BASENP (NN water) (NN ice)) (CC or) (BASENP (NN vapor))))) (S (VP (VBG using) (NP (BASENP (DT the) (NNP LCROSS) (NN satellite)) (SBAR (WHNP (WDT which)) (S (VP (MD will) (VP (VP (VB crash) (NP (BASENP (NN land)) (ADJP (JJ nearby)))) (ADVP (BASENP (NN four) (NNS minutes)) (RBR later))))))))))))))))))) (PERIOD .))