In the instance_types_en dataset of DBpedia (below is a partial extract of the dataset), what do the entries like Allan_Dwan__1, Allan_Dwan__2, Abraham_Lincoln__1 (similar entities) etc. mean?
I do not understand the type PersonFunction, TimePeriod. Can somebody explain?
<http://dbpedia.org/resource/Allan_Dwan> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Person> .
<http://dbpedia.org/resource/Allan_Dwan__1> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/PersonFunction> .
<http://dbpedia.org/resource/Allan_Dwan__2> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/PersonFunction> .
<http://dbpedia.org/resource/Allan_Dwan__3> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/PersonFunction> .
<http://dbpedia.org/resource/Abraham_Lincoln> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/OfficeHolder> .
<http://dbpedia.org/resource/Abraham_Lincoln__1> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/TimePeriod> .
<http://dbpedia.org/resource/Abraham_Lincoln__2> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/TimePeriod> .
<http://dbpedia.org/resource/Abraham_Lincoln__3> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/TimePeriod> .
These are used to represent relationships that are potentially more complicated than what can be represented by a single triplet. For example, for dbr:Abraham_Lincoln__1, the whole set of triplets it's in is:
dbr:Abraham_Lincoln dbo:termPeriod dbr:Abraham_Lincoln__1
dbr:Abraham_Lincoln__1 dbo:office "President of the United States"
dbr:Abraham_Lincoln__1 dbo:activeYearsStartDate 1861-03-04
dbr:Abraham_Lincoln__1 dbo:activeYearsEndDate 1865-04-15
dbr:Abraham_Lincoln__1 rdf:type dbo:TimePeriod
dbr:Abraham_Lincoln__1 rdf:type owl:Thing