(S (S (SBAR (S (PP-SBJ (NP (S-REL-NSBJ-NOBJ (VP (VBV 受け) (VP (MD た)))) (NN 警告)) (IN は)) (VP (PP (BASENP (NN 石油) (NN タンカー)) (IN に)) (VP (VBO 限ら) (VP (VB れる))))) (INCON が)) (COMMA 、) (S (SBAR (S (PP-SBJ (NP (PP (BASENP (NN ほか)) (IN の)) (BASENP (DT 大きな) (NN 貨物) (NN 船))) (IN も)) (VP (PP (NP (PP (BASENP (NN 襲撃)) (IN の)) (NN 危険)) (IN に)) (VP (VP (VP (VBO さらさ) (VP (VBV れ))) (INTE て)) (VP (VB いる))))) (INQT と)) (S (PP-SBJ (BASENP (NN 担当) (NN 官)) (IN は)) (VP (VBV 続け) (VP (MD た)))))) (PERIOD 。))
受け た 警告 は 石油 タンカー に 限ら れる が 、 ほか の 大きな 貨物 船 も 襲撃 の 危険 に さらさ れ て いる と 担当 官 は 続け た 。
While the threat received covered only oil tankers , other large cargo ships were also at risk of attack , naval officials went on to say .