(S (S (BASENP (DT The) (NNP AWPA)) (VP (VBD said) (SBAR (S (S (BASENP (DT the) (NN group)) (VP (VBD had) (VP (VBN been) (VP (VBN forced) (S (VP (TO to) (VP (VP (VB flee) (BASENP (NNP Papua))) (PP (IN by) (BASENP (NN boat)))))))))) (SBAR (IN because) (S (NP (NP (BASENP (DT the) (JJ usual) (NN way)) (PP (IN of) (S (VP (VBG leaving) (BASENP (DT the) (NN province)))))) (PRN (COLON --) (PP (IN by) (S (VP (VP (VBG crossing) (BASENP (DT the) (JJ eastern) (NN border))) (PP (IN into) (BASENP (NNP Papua) (NNP New) (NNP Guinea)))))) (COLON --))) (VP (VBD had) (VP (VBN been) (VP (VP (VBN made) (ADJP (RBR more) (JJ difficult))) (PP (IN by) (BASENP (JJ increased) (NN surveillance)))))))))))) (PERIOD .))