(S (S (PP (IN Since) (ADVP (RB then))) (COMMA ,) (S (BASENP (PRP it)) (VP (VBZ has) (VP (VBN conducted) (NP (BASENP (JJ many) (NN missile) (NNS tests)) (COMMA ,) (PP (VBG including) (NP (NP (BASENP (DT a) (JJ dense) (NN battery)) (PP (IN of) (BASENP (JJ land-to-ship) (NN missile) (NNS tests)))) (PP (IN in) (NP (BASENP (NN 2003)) (SBAR (WHADVP (WRB when)) (S (BASENP (NNS tensions)) (VP (VBD rose) (PP (IN over) (NP (BASENP (PRPD its) (JJ possible) (NN possession)) (PP (IN of) (BASENP (JJ nuclear) (NNS weapons))))))))))))))))) (PERIOD .))