Query Wikidata to get all properties that are subclasses of entity (all types of images associated with an entity)

Question

My goal is to get all images related to a wikidata entity. I can get the image property (of e.g. the statue of liberty) with the following query:

SELECT ?image WHERE
{
    wd:Q9202 wdt:P18 ?image.
}

This gets me the associated image but there are many types of image properties (P14, P15, P18, P41,...). They are all types of "Wikidata property for linking to a representative image (Q26940804)".

Is there an elegant way to get all properties that are subclasses of Q26940804 (getting all images)?

Answer 1

Truthy predicates, which start with wdt:P, are connected to wd:Q26940804 not directly, but through their prototypic properties, which start with wd:P.

SELECT ?predicate ?propertyLabel ?image WHERE
{
    wd:Q9202 ?predicate ?image .
    ?property wikibase:directClaim ?predicate .
    ?property wdt:P31 wd:Q26940804
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
}

Try it!

More info:

• RDF Dump Format § Properties
• RDF Dump Format § Predicates

Also, those wd:P18 etc. are instances of wd:Q26940804, not subclasses.