Note that x i,1 may not be identical to the gold-standard parse; in some cases the parser may fail to propose the correct parse anywhere in its list of candidates.
9 our training data consist of a set of parses, fx i, j : i ¼ 1, : : : , n, j ¼ 1, : : : , n i g, together with scores Scoreðx i, j Þ and log-probabilities Lðx i, j Þ.