For every row in the table, we have a multinomial distribution over context vocabulary θ r from a Dirichlet prior λ.
the probability of observing the tth context word for mention m is p(s where N −mt r is the number of context words of mentions assigned to row r, N −mt rs is the number of context words of mentions assigned to row r that are s mt , both excluding the current context word, and v ranges over the context vocabulary of size V .