(S (S (NP (BASENP (NNP Orange) (NNP X) (POS 's)) (PP (IN in) (BASENP (DT the) (NN area)))) (VP (VBP mark) (NP (BASENP (NNS buildings)) (SBAR (WHNP (WDT that)) (S (VP (VBP have) (VP (ADVP (RB already)) (VP (VBN been) (VP (VBN searched) (PP (IN for) (BASENP (NNS survivors)))))))))))) (PERIOD .))