(S (S (BASENP (DT The) (NN dhow)) (VP (VBD had) (VP (VBN been) (VP (VBN modified) (S (VP (TO to) (VP (VB have) (NP (NP (DT an) (NP (ADJP (JJ extra) (COMMA ,) (JJR higher)) (NN deck))) (VP (VBG making) (S (BASENP (DT the) (NN vessel)) (ADJP (RBR less) (JJ stable)))))))))))) (PERIOD .))