In other respects though, our approach is more ambitious because it focuses on the problem of recognizing such discourse relations in unrestricted texts.
given as input sentence pairs such as those shown in (1)-(2), we develop techniques and programs that label the relations that hold between these sentence pairs as CONTRAST, CAUSE-EXPLANATION-EVIDENCE, CONDITION, ELABO-RATION or NONE-OF-THE-ABOVE, even when the discourse relations are not explicitly signalled by discourse markers.