search

yago-naga / yago3

YAGO is a large semantic knowledge base, derived from Wikipedia, WordNet, WikiData, GeoNames, and other data sources
https://yago-knowledge.org/downloads/yago-3
GNU General Public License v3.0
729 stars 85 forks source link

Question regarding transitive types / subClassOf relations #13

Open maxidl opened 5 years ago

maxidl commented 5 years ago

When inspecting the yagoTransitiveType.tsv from the download page I noticed something strange. Doing a grep '<Albert_Einstein> yagoTransitiveType.tsv shows that he is associated with many different 'wikicat_People_from_X', which seems to be wrong. Screenshot from 2019-06-28 13-32-46

Looking into the taxonomy, I find that a lot of the states in the US are linked with subClassOf relations, and thus producing this problem. For example there is a relation <id_KOlZj0JAgT_owS_MsK3cIIAsG> <wikicat_People_from_California> rdfs:subClassOf <wikicat_People_from_Minnesota> resulting in all people from California also being people from Minnesota, which is a wrong assumption.

Maybe I am missing something or is this intended? Is my interpretation of the subClassOf relation correct?

maxidl commented 5 years ago

Browsing YAGO2 for the category does not show a subClassOf relation to any other category except "people", which would be the behaviour I expected.

maxidl commented 5 years ago

I found that Yago version 2.5 does not have this problem.