(S (S (BASENP (QP (RB Around) (NN 400)) (NN rescue) (NNS workers)) (VP (VBP are) (VP (VP (VBG helping) (BASENP (DT the) (NN rescue) (NN effort))) (CC and) (VP (VBG looking) (PP (IN for) (BASENP (DT any) (JJ possible) (NNS survivors))))))) (PERIOD .))