Many more improvements are seen when our post hoc validation and correction methodology, described in Section 5, is used, but the merging of fragments derived from different on-line systems also leads to an improvement in translation quality.
consider the examples in (45): (45) Input: an old story in common System B: une vieille histoire dans commun System combination Bc: une vieille histoire en commun the optional PP in common was mistranslated by system B as dans commun, but when knowledge from system c is added to that of system B, the improved translation en commun is generated.