Nested NER
Related Papers
A Unified MRC Framework for Named Entity Recognition
AbstractThe task of named entity recognition (NER) is normally divided into nested NER and flat NER depending on whether named entities are nested or not. Models are usually separately developed …...
HIT: Nested Named Entity Recognition via Head-Tail Pair and Token Interaction
AbstractNamed Entity Recognition (NER) is a fundamental task in natural language processing. In order to identify entities with nested structure, many sophisticated methods have been recently developed based on either …...
A Unified Generative Framework for Various NER Subtasks
AbstractNamed Entity Recognition (NER) is the task of identifying spans that represent entities in sentences. Whether the entity spans are nested or discontinuous, the NER task can be categorized into …...
Enhanced Language Representation with Label Knowledge for Span Extraction
AbstractSpan extraction, aiming to extract text spans (such as words or phrases) from plain text, is a fundamental process in Information Extraction. Recent works introduce the label knowledge to enhance …...
Extract-Select: A Span Selection Framework for Nested Named Entity Recognition with Generative Adversarial Training
AbstractNested named entity recognition (NER) is a task in which named entities may overlap with each other. Span-based approaches regard nested NER as a two-stage span enumeration and classification task, …...
The Bulgarian Event Corpus: Overview and Initial NER Experiments
AbstractThe paper describes the Bulgarian Event Corpus (BEC). The annotation scheme is based on CIDOC-CRM ontology and on the English Framenet, adjusted for our task. It includes two main layers: …...