The probability P (n j , c j |CF l , s j , A(s j ) = 1) is called generative probability of a case component and estimated as follows: means the generative probability of a content part n j from a case slot s j in a case frame CF l , and estimated by using the frequency of a case slot example in the automatically constructed case frames.
to deal with this sparseness problem, we generalize the examples of case slots.