(S (S (NP (BASENP (NN Three) (NN salvage) (NNS companies)) (SBAR (WHNP (WP who)) (S (VP (VBP are) (VP (VBG bidding) (S (VP (TO to) (VP (VB recover) (BASENP (DT the) (NN wreck)))))))))) (VP (VP (VBP have) (PP (IN until) (NP (BASENP (NN afternoon)) (PP (IN on) (BASENP (NNP Thursday)))))) (S (VP (TO to) (VP (VB submit) (BASENP (NNS proposals))))))) (PERIOD .))