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  • 1. What is a Named Entity?Lotte WilmsKoninklijke Bibliotheek14 June 2013 - BelgradePERS: Yellow, ORG: Orange, LOC: Blue 1
  • 2. A named entity is a unique identifier of entities.• PERSON: named person, family, or certain designated non-humanindividuals• ORGANIZATION: named corporate, governmental, or other organizationalentity• LOCATION: name of politically or geographically defined location (cities,provinces, countries, international regions, bodies of water, mountains,etc.) and astronomical locations.Source: 1999 Named Entity Recognition Task Definition, version 1.4, August 27 1999.ftp://jaguar.ncsl.nist.gov/ace/phase1/ne99_taskdef_v1_4.pdfPERS: Yellow, ORG: Orange, LOC: Blue 2
  • 3. Where are the named enities in the followingsentence?PERS: Yellow, ORG: Orange, LOC: Blue 3The American couple Bill and Susan Jones weresuch great fans of Apple’s computers that theytook them everywhere, such as the Big Apple,California and even to the Smiths.
  • 4. The American couple Bill and Susan Jones weresuch great fans of Apple’s computers that theytook them everywhere, such as the Big Apple,California and even to the Smiths.PERS: Yellow, ORG: Orange, LOC: Blue 4
  • 5. Special cases with named entitiesOtto and Vivika HeinoMulti-modifier, multi-name expressionsand nested expressionsLibrary and Archives CanadaNested expression! Part of theorganisation name, so not tagged aslocationPERS: Yellow, ORG: Orange, LOC: Blue 5Image courtesy of Padraic Ryan
  • 6. PERS: Yellow, ORG: Orange, LOC: Blue 6Special cases with named entitiesEntity expressions that modify non-taggablesand entities that possess other entitiesApple computerNorway’s ParliamentImage courtesy of Vichaya Kiatying-Angsulee
  • 7. PERS: Yellow, ORG: Orange, LOC: Blue 7Special cases with named entitiesTaggable Aliases and definitive articlesAcronymsAliasesOnly for established alternateway of referringIBMNew York = the Big AppleOnly include the article when it iscommonly associated with an entity
  • 8. PERS: Yellow, ORG: Orange, LOC: Blue 8Guidelines for the entity PERSONDr. Martin Luther King Jr.Regular titlesare not part ofNE, but titlesas prince/king/president/etc. are. Usecommonsense here Appositivesare too!the Clintons-s is alternateformScooby DooEven fictionalcharacters are NE,human or animal
  • 9. PERS: Yellow, ORG: Orange, LOC: Blue 9“I pray to God” vs. “he feels like a god”.Only tag god when an actual God ismeantOther noteworthy guidelinesGuidelines for the entity PERSONSaint George killed the dragon.Do not tag religious titles or specifiersThe U.S. Vice PresidentThe U.S. Vice President is not a uniqueattribution, so only tag locationMy cat Dot is very lazy.Animals haves names as wellHe won the Nobel prize.Do not tag diseases/weatherformations/prizes/laws/etc. that arenamed after peopleThe Bill Gates of the NetherlandsDo not tag Bill Gates, as this refers notto him, but to someone like him. Onlytag location.
  • 10. PERS: Yellow, ORG: Orange, LOC: Blue 10Guidelines for the entity LOCATION“Named heavenly bodies, continents, countries, provinces, counties, cities, regions, districts,towns, villages, neighborhoods, airports, military bases, railways, railroads, highways,bridges, street names, street addresses, oceans, seas, straits, bays, channels, sounds, rivers,islands, lakes, national parks, mountains, fictional or mythical locations, and certainstructures, such as the Eiffel Tower and Washington Monument, that were built primarily asmonuments.”France The market place of Guestrow Mount FijiDesignators that areintegrally associatedwith a location arealso tagged.
  • 11. PERS: Yellow, ORG: Orange, LOC: Blue 11Guidelines for the entity LOCATIONHyundai of Korea, Inc. Hyundai in KoreaThe White House, Washington, D.C.White House is an aliasfor U.S. president’sorganisation
  • 12. PERS: Yellow, ORG: Orange, LOC: Blue 12Guidelines for the entity LOCATIONMississippi River west bank A German newspaper in BambergDo not tag adjectivalforms of locationsDo not tagunspecificlocations such asthe South or theMiddle EastDo tag specificregions, such asthe Auvergne
  • 13. PERS: Yellow, ORG: Orange, LOC: Blue 13Guidelines for the entity ORGANISATIONTag “stock exchanges, multinational organizations, businesses, TV or radio stations, politicalparties, religions or religious groups, orchestras, bands, or musical groups, unions, non-generic governmental entity names such as “Congress” or “Chamber of Deputies,” sportsteams and armies (unless designated only by country names, which are tagged as LOCATION),as well as fictional organizations.”The Beatles The labor party De Tweede Kamer
  • 14. PERS: Yellow, ORG: Orange, LOC: Blue 14Guidelines for the entity ORGANISATIONFour Seasons HotelGhostbustersProper names referringto meeting placeswhere organisationalactivities occur are alsoLOC.‘the police’, ‘thegovernment’ and othergeneric names are nottagged.However, the Dutch army is tagged!
  • 15. PERS: Yellow, ORG: Orange, LOC: Blue 15Correct or not?Lotte was reading Romeo and Juliet on the plane to the Nikola Tesla Airport in Belgrade.The Volkskrant is a newspaper that is printed by De Persgroep Nederland in Amsterdam.My aunt Betty owns a dog Bob that loves going out to the Scheveningen beach.Lotte was reading Romeo and Juliet on the plane to the Nikola Tesla Airport in Belgrade.My aunt Betty owns a dog Bob that loves going out to the Scheveningen beach.
  • 16. A named entity is a unique identifier of entities.• PERSON: named person, family, or certain designated non-humanindividuals• ORGANIZATION: named corporate, governmental, or other organizationalentity• LOCATION: name of politically or geographically defined location (cities,provinces, countries, international regions, bodies of water, mountains,etc.) and astronomical locations.However, use common sense and keep it mind what you want to achieve!Source: 1999 Named Entity Recognition Task Definition, version 1.4, August 27 1999.ftp://jaguar.ncsl.nist.gov/ace/phase1/ne99_taskdef_v1_4.pdfPERS: Yellow, ORG: Orange, LOC: Blue 16
  • 17. PERS: Yellow, ORG: Orange, LOC: Blue 17Questions?Ask me almost anything!@lottewilmsLotte.wilms@kb.nl