@inproceedings{creatingandretrievingtenseandaspect,
  title = {Creating and retrieving tense and aspect annotation with GraphAnno, a lightweight tool for multi-level annotation},
  author = {Volker Gast and Bierk and Lennart t and Christoph Rzymski},
  year = {2015},
  booktitle = {WS 2015 4},
  url = {https://aclanthology.org/W15-0203},
}