For example, 18.3% of "就是" (just like) occurrences are segmented as a single word, and 81.7% of them are segmented into two single-character words "就" (just) and "是" (be) under similar context in the training set.
this paper thus proposes a new abstract aggregate candidate-feature, which indicates if the assigned tag follows the corresponding position-tag of the longest dictionary matching word.