Interesting insights from quotient RDF summaries

Finding data errors with quotient summaries

Weak summary of DBpedia person data graph

This summary leads to an unexpected insight into the RDF graph: it contains an error, since the node w1 has itself as birthPlace and deathPlace. How can this be? Looking at the data we find e.g. the triples:
<> <> <> .
<> <> <> .
and the second one leads to the self-loop for a birthPlace property in the summary. (The error probably comes from the wrong disambiguation).

Strong summary of DBpedia person data graph

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