Natural Language Understanding Wiki
Hierarchy of the inference classes

According to Gleize and Grau (2014) [1]

  • Tier 1: Word level
    • Pattern matching
    • Relatedness Class
  • Tier 2: Sentence leve
    • Structure
    • Concepts and relations
  • Tier 3: Beyond the text
    • Events and discourse
    • Visualization


  1. Gleize, M., & Grau, B. (2014). A Hierarchical Taxonomy for Classifying Hardness of Inference Tasks. In N. C. (Conference Chair), K. Choukri, T. Declerck, H. Loftsson, B. Maegaard, J. Mariani, … S. Piperidis (Eds.), Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC’14). Reykjavik, Iceland: European Language Resources Association (ELRA).