(S (S (SBAR (S (PP-SBJ (BASENP (NN 津波) (NN 警報)) (IN は)) (VP (BASENP (NN はじめ)) (VP (PP (NP (PP (BASENP (NN 震動)) (IN の)) (NN 後)) (IN に)) (VP (VP (VBO 出さ) (VP (VBV れ))) (VP (MD た)))))) (INCON が)) (COMMA 、) (S (ADVP (RB その後) (RB まもなく)) (S-NSBJ (VP (VP (VP (NN 撤回) (VBO さ)) (VP (VBV れ))) (VP (MD た)))))) (PERIOD 。))
津波 警報 は はじめ 震動 の 後 に 出さ れ た が 、 その後 まもなく 撤回 さ れ た 。
A tsunami alert was initially issued following the tremor , but it was retracted shortly afterwards .