(S (S (S (BASENP (DT The) (NNP Chesapeake) (NNP Bay) (NNP Program)) (VP (VBD launched) (NP (BASENP (DT the) (JJ new) (NN forecast)) (SBAR (S (VP (TO to) (VP (VB build) (PP (IN on) (NP (BASENP (DT a) (NN base)) (PP (IN of) (NP (BASENP (JJ environmental) (NNS data)) (VP (VBN gathered) (PP (IN over) (BASENP (DT the) (JJ last) (NN two) (NNS decades))))))))))))))) (SBAR (IN as) (S (BASENP (NN water) (NN quality) (NNS concerns)) (VP (VBP have) (VP (VBN grown)))))) (PERIOD .))