@inproceedings{ijcai1977p33,
  title     = {A Conceptual Theory of Question Answering},
  author    = {Lehnert, Wendy G.},
  booktitle = {Proceedings of the Fifth International Joint Conference on
               Artificial Intelligence, {IJCAI-77}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Raj Reddy},
  pages     = {158--163},
  year      = {1977},
  note      = {Natural Language},
  url       = {https://ijcai.org/proceedings/1977/33},
}