Pronoun P (n jm |CF l , s j , A =1) is similar to P (n j |CF l , s j , A=1) and can be estimated approximately from case frames using the frequencies of case slot examples.
while A (s j ) = 1 means s j is not filled with input case component but filled with an entity as the result of zero anaphora resolution, case frames are constructed by extracting only the input case component.