Hi Stas, hi all, I just noted that BlazeGraph seems to contain a few erroneous triples. The following query, for example, returns a blank node "t7978245": SELECT ?superClass WHERE { <http://www.wikidata.org/entity/Q595133> p:P279/ps:P279 ?superClass } https://query.wikidata.org/#SELECT%20%3FsuperClass%20WHERE%20{%0A%20%20%3Ch… I stumbled upon six cases like this (for P279): Q595133 (shown above), Q1691488, Q11259005, Q297106, Q1293664, and Q539558. This would be less than 0.001% of the 623,963 P279 statements, but it's still enough to have application code trip over the unexpected return format ;-). Best Markus -- Markus Kroetzsch Faculty of Computer Science Technische Universität Dresden +49 351 463 38486 http://korrekt.org/