(2010) adopted HMM and some rules to post-process the output of the CRF discriminative approach.
last, to fairly compare different models in a more realistic condition, Table 6 shows the results of the enhanced discriminative model (denoted by ED) and the integrated model (denoted by EI) with an external dictionary (which roughly corresponds to 65% D2 coverage rate in TABlE 4, and is specified in the next section).