Base Noun Phrase

AKA: Base NP, BaseNP, BaseNP Chunk, Non-Recursive Noun Phrase, Simple Noun Phrase.
Context:
- It can range from being a Simple Base Noun Phrase to being a Complex Base Noun Phrase.
- It can be mapped to zero or more Base Noun Phrase Mentions.
- It can have Zero or more premodifying Adjectives and/or Nouns.
- It can be detected by a Base Noun Phrase Chunking Task.
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Example(s):
- "[The apple] beside [the tree] is [a Macintosh].".
- …
Counter-Example(s):
- a Complex Noun Phrase.
- any Recursive Noun Phrase, such as: "[The apple beside the tree] is a Macintosh."
- any Noun within a multiword noun phrase, such as "The [apple] fell.".
- any Verb Phrase, such as: "The apple beside the tree [is a Macintosh]."
- any Prepositional Phrase, such as: "The apple [beside the tree] is a Macintosh."
See: Compound, Compound Noun Phrase, Non-Recursive Structure.

References

(Bunescu & Mooney, 2004) ⇒ Razvan C. Bunescu, and Raymond Mooney. (2004). “Collective Information Extraction with Relational Markov Networks.” In: Proceedings of the 42nd Annual Meeting of the Association for Computational Linguistics (ACL 2004). doi:10.3115/1218955.1219011.
- Definition 1: A base noun phrase is a maximal contiguous sequence of tokens whose POS tags are from {"JJ", "VBN", "VBG", "POS", "NN", "NNS", "NNP", "NNPS", "CD", "–"}, and whose last word (the head) is tagged either as a noun, or a number. Candidate extractions consist of base NPs, augmented with all their contiguous subsequences headed by a noun or number.

(Barker & Cornacchia, 2000) ⇒ Ken Barker, and Nadia Cornacchia. (2000). “Using Noun Phrase Heads to Extract Document Keyphrases.” In: Canadian Conference on AI (CAI 2000). doi:10.1007/3-540-45486-1.
- … A base noun phrase is a non-recursive structure consisting of a head noun and zero or more premodifying adjectives and/or nouns. The base noun phrase does not include noun phrase postmodifiers such as prepositional phrases or relative clauses. A base noun phrase skimmer proceeds through a text word-by-word looking for sequences of nouns and adjectives ending with a noun and surrounded by non-noun/adjectives.