In addition, since we have already built an unsupervised morph analyzer as described in section 3.1, which is acquired by the same bootstrapping algorithm, we would like to make use of them as well, in a straightforward way: as long as a word can be analyzed by the acquired morph analyzer, it should not be output as closed-class items.
we experiment with four lists of closed-class words of the top 200 words acquired by the 'baseline-typeC', 'baseline-tokenC', 'bootstrap-typeC' and 'bootstrap-tokenC' respectively, as introduced in section 3.2.