The figure displays the results of exploring paths up to a total length of 6 edges, performing backward search from the target nodes of up to j = 1, 2, 3 steps.
pRA encodes p (s → t; π j ), the probability of reaching target node t starting from source node s and following path π j , as a feature that describes the semantic relation between s and t. provided with a set of selected path types up to length , p = {π 1 , .