Over the WSJ, the Brill tagger achieves a modest tag recall of 0.103 for particles, and tag precision of 0.838.
as a research testbed and target resource to expand/domain-tune, we use the LinGO English Resource Grammar (LinGO-ERG), a linguistically-precise HPSG-based grammar under development at CSLI (Copestake and Flickinger, 2000;Flickinger, 2000).