Sparql get "is dbo:parent of" records from Dbpedia - sparql

Question

I am trying to get children of persons. Some persons have children listed in "dbo:child", others have them listed as "is dbo:parent of"
Here are examples of the two types
https://dbpedia.org/page/Elizabeth_II
https://dbpedia.org/page/George_V
For the first one I can pull child records off as follows:
SELECT * WHERE {
<http://dbpedia.org/resource/Elizabeth_II>
dbo:child?child
}
For the second it's a bit harder as I think I have to find other records which point to George_V. I'm struggling to find anything that works, this is the best I can come up with
SELECT *
WHERE
{
?person a dbo:Person ;
dbo:parent [dbo:Person dbr:George_V]
}
limit 10
What's the best way to do this? Is there a way I can combine the two approaches?

Answer 1

Here's an example that solves the problem. Note, you have to look at the data for familial properties (relationship types) and then explore regarding data quality.
PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX dbp: <http://dbpedia.org/property/>
SELECT DISTINCT ?royal ?ancestor
WHERE {
{
<http://dbpedia.org/resource/Charles,_Prince_of_Wales>
<http://dbpedia.org/property/father>+ ?ancestor .
}
UNION
{
<http://dbpedia.org/resource/Charles,_Prince_of_Wales>
<http://dbpedia.org/property/mother>+ ?ancestor .
}
BIND ( <http://dbpedia.org/resource/Charles,_Prince_of_Wales> as ?royal )
}
Live DBpedia Query Solution Link.
Alternatively, which is closer to your original property preference (i.e., dbo:parent), here is another property-paths based example.
PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX dbp: <http://dbpedia.org/property/>
SELECT DISTINCT ?royal ?ancestor ?ancestorName
WHERE {
<http://dbpedia.org/resource/Elizabeth_II>
dbo:parent* ?ancestor .
?ancestor
foaf:name ?ancestorName .
FILTER (LANG(?ancestorName) = "en")
BIND ( <http://dbpedia.org/resource/Elizabeth_II> as ?royal )
}
Live Query Results Link.
We are working on a new DBpedia release that should have increased quality regarding this kind of information.
Finally, a tweak to some earlier suggestions (posted as comments).
PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX dbr: <http://dbpedia.org/resource/>
SELECT DISTINCT ?royal ?child
WHERE {
dbr:George_V dbo:child+|^dbo:parent+ ?child .
BIND ( dbr:George_V AS ?royal )
}
Live DBpedia Query Link.