Wikidata Sparql: how to get a list of actors that where never directed by a given person? - sparql

Question

Let's say I want a list of actors that were never directed by Tim Burton among a list of popular movies.
I tried to do it with this steps:
Select all actors that Tim Burton ever directed (sub select)
Select a list of actors from a list of popular movies (by imdb ids)
Exclude all actors from the first selection in the second selection (NOT IN)
Here is a code I tried that do not works (the NOT IN fail, I don't know why):
SELECT DISTINCT ?actor ?actorLabel
WHERE {
?film wdt:P31 wd:Q11424
;wdt:P161 ?actor
;wdt:P345 ?imdbId .
{
SELECT ?excludeActors
WHERE {
?film wdt:P31 wd:Q11424
; wdt:P57 wd:Q56008
; wdt:P161 ?excludeActors .
}
} .
FILTER(?actor NOT IN (?excludeActors)) .
FILTER(?imdbId = "tt1077368" || ?imdbId = "tt0167260") .
SERVICE wikibase:label { bd:serviceParam wikibase:language "fr" }
}
Or follow this link
(there is a filter on Christopher Lee that you can remove [last one], it is used to highlight what I explain here:)
In this code I have two movies: Dark Shadows (directed by Tim Burton) and The Lord of the Rings 3. In this example Christopher Lee is present in both movies, which means he should be excluded since Tim Burton directed him in Dark Shadows.
You can see that he his in the list.
I really don't understand why the NOT IN fail with the sub select. I tried the sub Select request and I found Christopher Lee inside which means he should be excluded.

Answer 1

If I understood correctly, you want all actors that acted in the given movies, but have never acted in any movie directed by Tim Burton. I would use FILTER NOT EXISTS:
SELECT DISTINCT ?actor ?actorLabel
WHERE {
VALUES ?imdbId { "tt1077368" "tt0167260" }
?film wdt:P31 wd:Q11424
;wdt:P161 ?actor
;wdt:P345 ?imdbId .
FILTER NOT EXISTS {
[] wdt:P31 wd:Q11424
; wdt:P57 wd:Q56008
; wdt:P161 ?actor .
}
SERVICE wikibase:label { bd:serviceParam wikibase:language "fr" }
}
LIMIT 100