(S (S (BASENP (NNP Dutch) (NN adventurer) (NNP Ralph) (NNP Tuijn)) (VP (VBZ has) (VP (VBN reached) (NP (BASENP (DT the) (JJ halfway) (NN point)) (PP (IN of) (NP (BASENP (PRPD his) (NN attempt)) (S (VP (TO to) (VP (VB be) (NP (BASENP (DT the) (JJ first) (NN person)) (SBAR (S (VP (TO to) (VP (VP (VB row) (PP (IN across) (BASENP (DT the) (NNP Pacific) (NNP Ocean)))) (ADJP (JJ unaided)))))))))))))))) (PERIOD .))