Once the discourse-marker-based algorithm has hypothesized all relations it could, a word-co-occurrence-based algorithm examines every sentence/paragraph boundary for which a marker-based rhetorical relation has not been hypothesized and uses cohesion to produce such a hypothesis.
the distribution of relations inferred by the program is somewhat similar, with the most frequently used relations being JOINt~ ELABORAtION, and CONtRASt as well.