(S (S (S (BASENP (DT The) (NN explosion)) (VP (VBD occurred) (PP (IN on) (NP (BASENP (DT the) (NN grounds)) (PP (IN of) (NP (BASENP (DT a) (JJ military) (NN academy) (POS 's)) (BASENP (NN infantry) (NN school)))))))) (SBAR (WHADVP (WRB where)) (S (BASENP (NNS weapons) (CC and) (NN ammunition)) (VP (VBP are) (VP (VBN stored)))))) (PERIOD .))