(S (S (BASENP (EX There)) (VP (VBP are) (NP (NNS concerns) (SBAR (SBAR (IN that) (S (BASENP (DT the) (JJ two-year) (NN length)) (S (BASENP (DT the) (NNS recorders)) (VP (VBP have) (VP (VBN been) (VP (VP (VBN submerged) (PP (IN in) (BASENP (NN seawater)))) (PP (IN along) (PP (IN with) (NP (BASENP (JJ enormous) (NN pressure)) (VP (VBN located) (PP (IN at) (NP (BASENP (DT the) (NN depth)) (PP (IN of) (BASENP (DT the) (NN wreck))))))))))))))) (COMMA ,) (SBAR (IN that) (S (NP (BASENP (DT the) (NN data)) (PP (IN on) (BASENP (DT the) (NNS recorders)))) (VP (MD might) (VP (VB be) (ADJP (JJ unreadable)))))))))) (PERIOD .))