Support (?, instance of, actor) ∩ (?, wife, (John F. Kennedy, sister, ?))

[yhamoudi]

The normal form (?, wife, (John F. Kennedy, sister, ?)) is correctly handled. However the whole form (with the intersection) doesn't work.

I don't know the reason, but if it's because of the huge number of actors, you should process (?, wife, (John F. Kennedy, sister, ?)) first and then only look if one of the returned results is an actor (instead of getting all the actors in wikidata, and then perform the intersection).