Relationship types

There are many possible relationship types. A few categories and examples of relationships are found in the following table. An interesting site that contains a multitude of relationships is Freebase (https://www.freebase.com/). It is a database of people, places, and things organized by categories. The WordNet thesaurus (http://wordnet.princeton.edu/) contains a number of relationships:

Relationship	Example
Personal	father-of, sister-of, girlfriend-of
Organizational	subsidiary-of, subcommittee-of
Spatial	near-to, northeast-of, under
Physical	part-of, composed-of
Interactions	bonds-with, associates-with, reacts-with

 

Named Entity Recognition (NER) is a low-level type of NLP classification that was covered in Chapter 4, Finding People and Things. However, many applications need to go beyond this and identify different types of relationships. For example, when NER is applied to identify individuals, then knowing that we are dealing with a person can further refine the relationships that...