String f_dev_hg_prefix=args[0].trim();
String f_dev_items = f_dev_hg_prefix +".items";
String f_dev_rules = f_dev_hg_prefix +".rules";
SymbolTable p_symbol = new BuildinSymbol(null);
int baseline_lm_feat_id =0;
int num_sents =5;
double scale=1.0;
DefaultSemiringParser ds = new HypLenExpectation(1,0,scale);
DiskHyperGraph dhg_test = new DiskHyperGraph(p_symbol, baseline_lm_feat_id, true, null); //have model costs stored