(S (S (ADVP (RB However)) (COMMA ,) (S (PP (IN despite) (NP (BASENP (DT the) (NN discovery)) (PP (IN of) (BASENP (DT the) (NN wreckage))))) (COMMA ,) (S (NP (NP (BASENP (DT the) (NN plane) (POS 's)) (BASENP (NN two) (NN flight) (NNS recorders))) (COMMA ,) (NP (NP (BASENP (DT the) (NN flight) (NN data) (NN recorder)) (PRN (LRB -LRB-) (BASENP (NNP FDR)) (RRB -RRB-))) (CC and) (NP (BASENP (DT the) (NN cockpit) (NN voice) (NN recorder)) (PRN (LRB -LRB-) (BASENP (NNP CVR)) (RRB -RRB-))))) (VP (VBP have) (VP (ADVP (RB yet)) (VP (TO to) (VP (VB be) (VP (VBN found) (PP (IN at) (BASENP (DT the) (NN crash) (NN site))))))))))) (PERIOD .))