km#knowledge_extraction_from_documents
  exclusion:  km#knowledge_extraction_from_databases
  supertype:  km#semi_automatic_KA_from_data__knowledge_discovery__knowledgediscovery__data_mining
  subtype:  km#semantic_web_mining
  subtype:  km#knowledge-oriented_NLP
     subtype:  km#CG_extraction_by_NLP
  subtype:  km#ontology_extraction_from_documents
     subtype:  km#terminological_analysis
  subtype:  km#document_structure_analysis_or_discovery

4 statements are about indirect instances of km#knowledge_extraction_from_documents: km#graph12_on_article, km#graph13_on_article, km#graph14_on_article, km#graph21_on_article
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