(S (S (ADVP (RB However)) (COMMA ,) (S (NP (BASENP (DT the) (NNP US) (NN government) (NN agency)) (PRN (COMMA ,) (BASENP (DT the) (NNP FDA)) (COMMA ,))) (VP (VP (VBD decided) (PP (IN in) (NP (BASENP (NNP February)) (PP (IN of) (BASENP (DT this) (NN year)))))) (S (VP (TO to) (VP (VB allow) (S (BASENP (DT the) (NN product)) (ADVP (RB back) (PP (IN on) (BASENP (DT the) (NNS shelves))))))))))) (PERIOD .))