  Recently developed pre-trained text-and-layout models (PTLMs) have shown
remarkable success in multiple information extraction tasks on visually-rich
documents. However, the prevailing evaluation pipeline may not be sufficiently
robust for assessing the information extraction ability of PTLMs, due to
inadequate annotations within the benchmarks. Therefore, we claim the necessary
standards for an ideal benchmark to evaluate the information extraction ability
of PTLMs. We then introduce EC-FUNSD, an entity-centric benckmark designed for
the evaluation of semantic entity recognition and entity linking on
visually-rich documents. This dataset contains diverse formats of document
layouts and annotations of semantic-driven entities and their relations.
Moreover, this dataset disentangles the falsely coupled annotation of segment
and entity that arises from the block-level annotation of FUNSD. Experiment
results demonstrate that state-of-the-art PTLMs exhibit overfitting tendencies
on the prevailing benchmarks, as their performance sharply decrease when the
dataset bias is removed.
