We also modify the definition of p(i, j), the probability of two nodes t i and t j propagating to each other. Zhang et al. (2014) compute this probability according to Formula 2, which highlights the number of neighbors, but weakens the relatedness between nodes, due to the normalization. We modify this setup by removing the normalization process and computing p(i, j) as the relatedness between t i and t j directly, which is evaluated according to Formula 1 .