@inproceedings { LakemeyerLevesque:IJCAI99:Query,
  title       = {Query Evaluation and Progression in {AOL} Knowledge Bases},
  author      = {Lakemeyer, Gerhard and Levesque, Hector J.},
  booktitle   = {International Joint Conference on Artificial Intelligence (IJCAI-99)},
  year        = {1999},
  url_PDF     = {https://kbsg.rwth-aachen.de/sites/kbsg/files/lakemeyer1999.pdf},
}

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