20M Lattice Y 9.0 3.1 1.0 13.1 2801 20M List Y 9.0 3.3 0.9 13.3 16030 Table 2 : Results for parsing HUB-1 n-best word lattices and lists : OP = overparsing , S = substutitions ( % ) , D = deletions ( % ) , I = insertions ( % ) , T = total WER ( % ) .