@prefix pr: <http://www.wikidata.org/prop/reference/> .
@prefix wdref: <http://www.wikidata.org/reference/> .

wdref:e5d2232e155b29c317b44d3e12c2fc52f2f3d4e4 pr:P854 <https://www.wolframalpha.com/input/?i=ellipsoid+volume+semi-axis+lengths+1050+840+537> .