Other projects aim at annotating discourse relations between clauses, among which causal relations, marked or not by discourse connectives such as because or then (Prasad et al., 2008;Carlson et al., 2007).
larger lexical projects have on the one hand covered all sorts of POS expressing causality (including nouns, verbs, adverbs, conjunctions, prepositions, adjectives) and on the other hand, distinguished a much larger set of causal relationships involving events as well as facts: for instance in FrameNet (henceforth FN) (Baker et al., 1998), some frames are concerned with argumentation, where typical causal expressions introduce evidence for a claim, or reasons for an agent's behaviour.