(S (S (BASENP (NNS Rescuers)) (VP (VP (VP (VP (VBD used) (BASENP (NNS helicopters) (CC and) (NNS dogs))) (S (VP (TO to) (VP (VB search) (PP (IN for) (BASENP (NNS survivors))))))) (PP (IN for) (BASENP (DT a) (NN day)))) (CONJP (COMMA ,) (CC but)) (VP (VBD failed) (S (VP (TO to) (VP (VB find) (BASENP (DT any)))))))) (PERIOD .))