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YAGO – A Core of Semantic Knowledge Fabian M. Suchanek, Gjergji Kasneci, Gerhard Weikum. Hari K Devulapally Motivation  But: Maybe there are other Rock N'Roll geniuses in his generation? Usual solution Which other singers were born when Elvis was born? I'm Feeling Lucky Google Search

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yago a core of semantic knowledge fabian m suchanek gjergji kasneci gerhard weikum

YAGO – A Core of Semantic KnowledgeFabian M. Suchanek, Gjergji Kasneci, Gerhard Weikum.

Hari K Devulapally

motivation

Motivation

But: Maybe there are other Rock N'Roll geniuses in his generation?

usual solution

Usual solution

Which other singers were born when Elvis was born?

I'm Feeling Lucky

Google Search

Elvis Presley - Wikipedia, the free encyclopedia

Elvis Presley was born on January 8, 1935 at around 4:35 a.m. in a two-room ... Othersingers had been doing this for generations, but they were black. ...

en.wikipedia.org/wiki/Elvis_PresleyCachedSimilar pages

usual solution4

Usual solution

Which other singers were born in Elvis' year of birth?

I'm Feeling Lucky

Google Search

Elvis Presley - Wikipedia, the free encyclopedia

Elvis Presley was born on January 8, 1935 at around 4:35 a.m. in a two-room ... Othersingers had been doing this for generations, but they were black. ...

en.wikipedia.org/wiki/Elvis_PresleyCachedSimilar pages

Reason: Google does not search knowledge, but Web pages

slide5
YAGO
  • YAGO is a ontology that combines high coverage with high quality.
  • Information is obtained from Wikipedia and WordNet.
  • YAGO is based on a data model of entities and binary relations.
yago model
YAGO Model
  • A slight variation to RDFS.
  • The YAGO model also expresses relations between facts and relations.
examples of entities relations
Examples of Entities - Relations
  • AlbertEinstein hasWonPrize NobelPrize
  • “Einstein” means AlbertEinstein
  • AlbertEinstein type physicist
  • physicist subClassOf scientist
semantics
Semantics
  • Fact
  • Fact Identifier
  • Common Entities
  • YAGO ontology is defined as a function over a finite set of common entities C, a finite set of relation names R and a finite set of fact identifiers I
exploiting the wikipedia category system

Exploiting the Wikipedia category system

Elvis Pr

born

1935

blah blah blub Elvis (don't read this! Better listen to the talk!) laber fasel suelz. Insbesondere, blub, texte zu, und so weiter blah blah blub Elvis laber fasel suelz. Blub, aber blah! Insbesondere, blub, texte zu, und so weiter blah blah blub Elvis laber fasel suelz. Insbesondere, blub, texte zu, und so weiter

Exploit relational categories

Categories:

1935_births

exploiting the wikipedia category system10

Exploiting the Wikipedia category system

American_singer

Elvis Pr

is a

born

1935

blah blah blub Elvis (don't read this! Better listen to the talk!) laber fasel suelz. Insbesondere, blub, texte zu, und so weiter blah blah blub Elvis laber fasel suelz. Blub, aber blah! Insbesondere, blub, texte zu, und so weiter blah blah blub Elvis laber fasel suelz. Insbesondere, blub, texte zu, und so weiter

Exploit relational categories

Exploit conceptual categories

Categories:

American_singers

exploiting the wikipedia category system11

Exploiting the Wikipedia category system

Disputed_article

American_singer

Elvis Pr

is a

is a

born

1935

blah blah blub Elvis (don't read this! Better listen to the talk!) laber fasel suelz. Insbesondere, blub, texte zu, und so weiter blah blah blub Elvis laber fasel suelz. Blub, aber blah! Insbesondere, blub, texte zu, und so weiter blah blah blub Elvis laber fasel suelz. Insbesondere, blub, texte zu, und so weiter

Exploit relational categories

Exploit conceptual categories

Categories:

Avoid administrational categories

Disputed_articles

exploiting the wikipedia category system12

Exploiting the Wikipedia category system

Rock'n_Roll_Music

American_singer

Elvis Pr

is a

is a

born

1935

blah blah blub Elvis (don't read this! Better listen to the talk!) laber fasel suelz. Insbesondere, blub, texte zu, und so weiter blah blah blub Elvis laber fasel suelz. Blub, aber blah! Insbesondere, blub, texte zu, und so weiter blah blah blub Elvis laber fasel suelz. Insbesondere, blub, texte zu, und so weiter

Exploit relational categories

Exploit conceptual categories

Categories:

Avoid administrational categories

Rock'n_Roll_Music

Avoid thematic categories

thematic vs conceptual categories

Thematic vs Conceptual Categories

conceptual:

American singers of German origin

thematic:

Rock N'Roll music in America

Shallow linguistic noun phrase parsing:

Premodifier Head Postmodifier

Heuristics: If the head is a plural word, the category is conceptual

relations
Relations

subClassOf:

  • The hierarchy given in Wikipedia does not help.
  • Word Net is used to establish the hierarchy.

Means Relation

  • Uses word meaning to establish Means Relation.
  • A class for each Synset and Each word in the Synset has a Means relation with the corresponding class
  • Using Wikipedia Redirects
  • Similarly, GIVENNAMEOF and FAMILYNAMEOF relations are established.
the yago ontology number of facts
The YAGO ontology: Number of Facts

6,000,000

Ontologies should not be judged purely by the number of facts! This is just an informational overview.

2,000,000

30,000 60,000 200,000 300,000

Yago

KnowItAll SUMO WordNet OpenCyc Cyc

conclusion
Conclusion
  • YAGO, a large and extendable ontology of high quality.
  • YAGO contains 1 million entities and 5 million facts – more than any other publicly available formal ontology.
  • YAGO has a near-human accuracy around 95%.