(S (S (SBAR (IN While) (S (VP (VBG running) (PP (IN on) (BASENP (RB only) (DT the) (NN port) (JJ main) (NN engine)))))) (COMMA ,) (S (S (BASENP (JJ strong) (NNS waves)) (VP (VP (VBD battered) (BASENP (DT the) (NN ship))) (PP (IN until) (ADVP (ADVP (RB shortly)) (PP (IN after) (NP (BASENP (NN 7:00) (NN p.m.)) (BASENP (NNP Tuesday) (NN night)))))))) (COMMA ,) (SBAR (WHADVP (WRB when)) (S (BASENP (PRP she)) (VP (VP (VBD went) (PRT (RP down))) (PP (IN at) (BASENP (NNP Antique)))))))) (PERIOD .))