Health Natural Language Processing (hNLP) Center

The Health Natural Language Processing (hNLP) Center targets a key challenge to current hNLP research and health-related human language technology development: the lack of health-related language data.

The Center’s primary activities are to:

  1. Provide a repository and a data curation, distribution and management point for health-related language resources
  2. Support sponsored research programs and health-related language-based technology evaluations
  3. Engage in collaborations with US and foreign researchers, institutions and data centers
  4. Host and participate in various workshops

The data consists of de-identified clinical notes from several institutions. We have paid special attention to the de-identification process which included a combination of automatic and manual redacting of information.

To obtain a data set, you must be a member.

Layered Annotations

Some data sets contain layers of annotations. Click an image below to expand it.

Entity Recognition

The entities "CT scan", "lesions", and "liver" in the sentence "The patient underwent a CT scan in April which did not reveal lesions in his liver."

Semantic Role Labelling

Semantic roles labelled in the sentence "The patient underwent a CT scan in April which did not reveal lesions in his liver."

Properties and Relations

The location-of relation and the negation and subject properties of entities in the sentence "The patient underwent a CT scan in April which did not reveal lesions in his liver."

Temporal

Temporal expressions, "contains" relations, and coreferences in the sentence "The patient underwent a CT scan in April which did not reveal lesions in his liver."
The entities "CT scan", "lesions", and "liver" in the sentence "The patient underwent a CT scan in April which did not reveal lesions in his liver."
Semantic roles labelled in the sentence "The patient underwent a CT scan in April which did not reveal lesions in his liver."
The location-of relation and the negation and subject properties of entities in the sentence "The patient underwent a CT scan in April which did not reveal lesions in his liver."
Temporal expressions, "contains" relations, and coreferences in the sentence "The patient underwent a CT scan in April which did not reveal lesions in his liver."