Prof. Dr. Felix Naumann


Full Paper Accepted at JCDL 2023

We are excited to report that the paper "Efficient Ultrafine Typing of Named Entities" was accepted as a full paper at the ACM/IEEE Joint Conference on Digital Libraries (JCDL 2023). The conference will be held in Santa Fe, New Mexico, USA from the 26th to 30th of June 2023.

Efficient Ultrafine Typing of Named Entities

Authors: Alejandro Sierra-Múnera, Jan Westphal and Ralf Krestel

Ultrafine named entity typing (UFET) refers to the assignment of predefined labels to entity mentions in a given context. In contrast to traditional named entity typing, the number of potential labels is in the thousands and one mention can have more than one assigned type.Previous approaches either depend on large training datasets, or require inefficient encoding of all input-type combinations. Therefore, there is a need for investigating the efficiency during training and prediction of entity typing models in the ultrafine-grained setting, considering its distinctively bigger search space, compared to the coarse- and fine-grained tasks.

To efficiently solve UFET, we propose Decent, a lightweight model that encodes, using a pretrained language model, the input sentences separately from the type labels. Additionally, we make use of negative oversampling to speed up the training while improving the generalization of unseen types. Using an openly available UFET dataset, we evaluated the classification and runtime performance of Decent and observed that training and prediction runtime is orders of magnitude faster than the current state-of-the-art approaches, while maintaining a competitive classification performance.