Question: What is { academic degree } of { Ludwig Boltzmann } that is { point in time } is { 1866.0 }?
Paraphrase: in 1866 what degree did Ludwig Boltzmann obtain?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q84296 p:P512 ?s . ?s ps:P512 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'1866')) }