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nlpstanford-nlppycorenlp

CoreNLP: Can it tell whether a noun refers to a person?

Can CoreNLP determine whether a common noun (as opposed to a proper noun or proper name) refers to a person out-of-the-box? Or if I need to train a model for this task, how do I go about that?

First, I am not looking for coreference resolution, but rather a building block for it. Coreference by definition depends on the context, whereas I am trying to evaluate whether a word in isolation is a subset of "person" or "human". For example:

is_human('effort') # False
is_human('dog') # False
is_human('engineer') # True

My naive attempt to use Gensim's and spaCy's pre-trained word vectors failed to rank "engineer" above the other two words.

import gensim.downloader as api
word_vectors = api.load("glove-wiki-gigaword-100") 
for word in ('effort', 'dog', 'engineer'):
    print(word, word_vectors.similarity(word, 'person'))

# effort 0.42303842
# dog 0.46886832
# engineer 0.32456854

I found the following lists from CoreNLP promising. 

dcoref.demonym                   // The path for a file that includes a list of demonyms 
dcoref.animate                   // The list of animate/inanimate mentions (Ji and Lin, 2009)
dcoref.inanimate 
dcoref.male                      // The list of male/neutral/female mentions (Bergsma and Lin, 2006) 
dcoref.neutral                   // Neutral means a mention that is usually referred by 'it'
dcoref.female 
dcoref.plural                    // The list of plural/singular mentions (Bergsma and Lin, 2006)
dcoref.singular

Would these work for my task? And if so, how would I access them from the Python wrapper? Thank you.

Solution

  • I would suggest trying WordNet instead and see:

    1. if enough of your terms are covered by WordNet and
    2. if the terms you want are hyponyms of person.n.01.

    You'd have to expand this a bit to cover multiple senses, but the gist would be:

    from nltk.corpus import wordnet as wn

# True
wn.synset('person.n.01') in wn.synset('engineer.n.01').lowest_common_hypernyms(wn.synset('person.n.01'))

# False
wn.synset('person.n.01') in wn.synset('dog.n.01').lowest_common_hypernyms(wn.synset('person.n.01'))

    See the NLTK docs for lowest_common_hypernym: http://www.nltk.org/howto/wordnet_lch.html