(S (S (BASENP (DT The) (NNP Serbian) (NNP Air) (NNP Force)) (VP (VBZ has) (NP (BASENP (NN five) (NNPS MiG-29s)) (SBAR (WHNP (WDT which)) (S (VP (VBD were) (VP (VP (VBN repaired) (PP (IN between) (BASENP (NN 2007) (CC and) (NN 2008)))) (PP (IN at) (NP (BASENP (DT a) (NN cost)) (PP (IN of) (NP (BASENP (DOLLAR $) (NN 15m)) (PRN (LRB -LRB-) (BASENP (QP (SHARP #) (NN 13) (NN m))) (RRB -RRB-))))))))))))) (PERIOD .))