Question: What is the significance of the GPS coordinates 48.856577777778 2.3518277777778 in the life of French mathematician Siméon Denis Poisson?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q190772 wdt:P937 ?answer . ?answer wdt:P625 ?x FILTER(contains(?x,'48.856577777778 2.3518277777778'))}