(2) The speakers in a dyadic conversation have different linguistic characteristics, sentiments and personalities.
(3) Compared with the Gau-Generators in Generator KL, the vMF-Generators (i.e., SVN, SSVN Gau−E and SSVN) have the much higher KL values, indicating that the vMF is a better selection than Gaussian to solve the KL-vanishing problem.