These decomposed sub-frames and subparts consist of a set of sub-frames, VCN and sets of subparts VC and VN, respectively.
in order to get reliable bilingual knowledge base of surface verb sub-categorization patterns, we take the following stepwise filtering method: step 1. filter out the reliable translation correspondences from all of the alignment pairs by ¾ test at a probability level of « 1 step 2. decompose the extracted verb sub-categorization pattern into sub-frames, and a sub-frame into two sub-parts such as a verb-case marker part and a verb-nominal part step 3. filter out reliable sub-parts vc and vn by ¾ test at a probability level of « 3 step 4. filter out a reliable sub-frame vcn by unifying the reliable sub-parts, vc and vn step 5. filter out reliable verb sub-categorization patterns vsubcat through the unification of reliable sub-frames Ú Ò ½ ¡ ¡ ¡ Ú Ò Ò we filter reliable sub-parts by ¾ test on vc and vn where bilingual verb pairs and nominal pairs should be ones passed the ¾ test of translation correspondences.