(S (S (BASENP (NNS People)) (VP (VP (VP (VBD came) (PP (IN across) (BASENP (NNP Canada)))) (PP (TO to) (BASENP (NNP Ottawa)))) (S (VP (TO to) (VP (VB celebrate) (NP (BASENP (NNP Canada) (POS 's)) (BASENP (JJ 139th) (NN birthday)))))))) (PERIOD .))