Retrieving Adjective Gradations from Adjective Definitions

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Retrieving Adjective Gradations from Adjective
Definitions

• John Garrod, Chloe Kiddon, Brad Moore

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Motivation

• refine WordNets similar to relation

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Approach

• Extract intensity relations from text
• Plain text and corpora not useful for finding
  adjective relations
• Usually dont occur in text
• Best current work only clusters adjectives into
  broad simliar groups, not find fine-grained
  relations between them
• Use WordNet glosses and dictionary definitions to
  find the relations

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Search
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Search
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Example Sentence

• Nefarious
• Infamous by way of being extremely wicked.
• Nefarious entails wicked.
• (Dictionary.com)

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Relations found

• hot_under_the_collar(p) entails angry
• greedy entails desirous
• overabundant entails abundant
• hot entails lucky
• brisk entails active
• acute entails sharp
• virulent entails infectious
• irate entails angry
• deep entails intellectual
• fetching entails attractive
• advantageous entails favorable

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More Input Data

• Often glosses do not contain useful comparisons
  even between related adjectives
• Draw more input from dictionary.com definitions
• Differentiate and isolate adjective senses
• Easily extendable to other online references.

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Quality of Results

• No reference data to compare
• Took relations we found, randomly changed type of
  relationship, and surveyed
• Real relationships 65 valid
• Faked relationships 30 valid
• Reason to believe actually results are higher
  quality than that. Human vocabulary is less than
  dictionary vocabulary, after all.
• stiff entails high marked as invalid, but what
  about stiff prices?

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Possible Extensions

• Train on other corpora
• Handle antonyms
• Parse training sentences to avoid part of speech
  errors
• pinstriped -gt having very thin stripes
• But pinstriped does not entail thin