(SINV (SINV (SBAR (RB Only) (SBAR (IN once) (S (BASENP (NN rescue) (NNS workers)) (VP (VBD reached) (NP (BASENP (DT the) (JJ hardest) (JJ hit) (NNS areas)) (PP (IN of) (BASENP (DT the) (NN storm)))))))) (SINV (SINV (VBD did) (BASENP (PRP they))) (VP (VB begin) (S (VP (TO to) (VP (VB realize) (NP (BASENP (DT the) (NN extent)) (PP (IN of) (NP (BASENP (NNS damage)) (SBAR (WHNP (WP that)) (S (VP (VBD had) (VP (VBN occurred)))))))))))))) (PERIOD .))