(S (S (NP (BASENP (NNP Britain) (POS 's)) (NP (NP (BASENP (NNP Ministry)) (PP (IN of) (BASENP (NNP Defense)))) (PRN (LRB -LRB-) (BASENP (NNP MoD)) (RRB -RRB-)))) (VP (VBZ has) (VP (VBN admitted) (NP (NP (BASENP (NN sixteen) (NNS instances)) (PP (IN of) (S (BASENP (JJ sensitive) (NN information)) (VP (VBG being) (VP (VBN leaked) (PP (IN on) (BASENP (JJ social) (NN networking) (NNS websites)))))))) (PP (IN in) (BASENP (DT the) (JJ past) (NN eighteen) (NNS months))))))) (PERIOD .))