For DMs + rb, DMs + vb and DMs + rb + vb we also tried weighting the cooccurrences so that the sums of the co-occurrences with each of verbs, adverbs and discourse markers were equal.
secondly, we would like to see how far our results can be extended to include adverbial discourse markers, such as instead or for example, by using just features of the clauses they occur in.