@inproceedings{adiscoursesignalannotationsystemforrst,
  title = {A Discourse Signal Annotation System for RST Trees},
  author = {Luke Gessler and Yang Liu and Amir Zeldes},
  year = {2019},
  booktitle = {WS 2019 6},
  url = {https://aclanthology.org/W19-2708},
}