1: for each news cluster c ∈ N do 2: Sample a latent event type vector t ∼ Normal(α) 3: for each entity e ∈ Ec do 4: Sample a slot s ∼ Multinomial(MLP(t; θ)) 5: Sample a head h ∼ Multinomial(1, λs) 6: Sample a feature vector f ∼ Normal(βs) 7: end for 8: end for A limitation of ODEE-F is that sampling slot assignment s from a global uniform distribution does not sufficiently model the fact that different events may have different slot distributions.
in Figure 2(b), we further sample a latent event type vector t ∈ R n for each news cluster from a global normal distribution parameterized by α.