Question: What time does Arthur Cayley, member of the Royal Astronomical Society start?
Paraphrase: Who was the member of Royal Astronomical Society at the time of Arthur Cayley?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q159430 p:P463 ?s . ?s ps:P463 wd:Q753299 . ?s pq:P580 ?value}