I am trying to write a query that returns all possible information from a wikidata page, as https://www.wikidata.org/wiki/Q1299.
Ideally I would like to retrieve all info that are present in that page in english language.
So I am trying this query:
SELECT ?wdLabel ?ps_Label ?wdpqLabel ?pq_Label WHERE {
VALUES ?artist {
wd:Q1299
}
?artist ?p ?statement.
?statement ?ps ?ps_.
?wd wikibase:claim ?p;
wikibase:statementProperty ?ps.
OPTIONAL {
?statement ?pq ?pq_.
?wdpq wikibase:qualifier ?pq.
}
SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
}
which works quite fine but I would like to retrieve all wikidata ids on the ps_Label column.
For example here I have Paul McCartney as string and I would like to also have the wikidata ID associated to that item, which is Q2599
has part Paul McCartney start time 1960-01-01T00:00:00Z
has part Paul McCartney end time 1970-01-01T00:00:00Z
has part Paul McCartney object has role singer
has part Paul McCartney object has role instrumentalist
Something similar to this other below but I can't merge the two together as I am missing some hint on sub-properties here.
SELECT ?propUrl ?propLabel ?valUrl ?valLabel WHERE {
wd:Q1299 ?propUrl ?valUrl.
?property ?ref ?propUrl;
rdf:type wikibase:Property;
rdfs:label ?propLabel.
?valUrl rdfs:label ?valLabel.
FILTER((LANG(?valLabel)) = "en")
FILTER((LANG(?propLabel)) = "en")
}
ORDER BY (?propUrl) (?valUrl)
Thanks a lot for your help!
This isn’t exactly what you’re asking for, but if you really just want all data on a single object, it is far easier and more economical to use the data access provided by https://www.wikidata.org/wiki/Special:EntityData/Q2599.json
Related
I want to find all children's fiction writers using Wikidata SPARQL query. But I couldn't figure out how? Can someone help, please? The following is my approach but I don't think it is the correct way.
SELECT ?item ?itemLabel {
?item wdt:P31 wd:Q5. #find humans
?item wdt:P106 wd: #humans whose occupation is a novelist
[another condition needed] #children's fiction.
SERVICE wikibase:label {bd:serviceParam wikibase:language 'en'.}
} LIMIT 10
There is not one correct way, especially not in Wikidata where not all items of the same kind necessarily have the same properties.
One way would be to find the authors of works that are intended for (P2360) children:
# it’s a literary work (incl. any sublasses)
?book wdt:P31/wdt:P279* wd:Q7725634 .
# the literary work is intended for children
?book wdt:P2360 wd:Q7569 .
# the literary work has an author
?book wdt:P50 ?author .
# the author is a US citizen
?author wdt:P27 wd:Q30 .
Instead of getting all works that belong to the class "literary work" or any of its subclasses, you could decide to use only the class "fiction literature" (Q38072107) instead; with the risk that not all relevant works use this class.
Another way would be to find all authors that have "children’s writer" (Q4853732), or any of its subclasses, as occupation:
?author wdt:P106/wdt:P279* wd:Q4853732 .
?author wdt:P27 wd:Q30 .
As the different ways might find different results, you could could use them in the same query, using UNION:
SELECT DISTINCT ?author ?authorLabel
WHERE {
{
# way 1
}
UNION
{
# way 2
}
UNION
{
# way 3
}
SERVICE wikibase:label {bd:serviceParam wikibase:language 'en'.}
}
Can anybody help me to understand why the ?sEnd attribute is empty for the last record here?
SELECT ?sLabel ?sStart ?sEnd
WHERE {
BIND(wd:Q32522 as ?p).
?s wdt:P26 ?p .
OPTIONAL { ?s p:P26 [pq:P580 ?sStart] }
OPTIONAL { ?s p:P26 [pq:P582 ?sEnd] }
SERVICE wikibase:label { bd:serviceParam wikibase:language 'en' }
}
Basically, what I want to retrieve is Jennifer Aniston's spouses with marriage start and end dates.
Thanks in advance!
The issue seems to be that you are querying for the marriage dates of Jennifer Aniston's spouses, as opposed to hers directly.
Your query returns some odd results, for two different reasons:
1.Brad Pitt was married a second time, to Angelina Jolie (2014-19).
Your query is therefore returning those dates as well.
2.The data for Justin Theroux and Jennifer Aniston are inconsistent (this is a Wikidata issue). In particular, as #UninformedUser pointed out, Justin's page has no end date for their marriage.
Jennifer Aniston's data on her marriage with Justin is more specific than his data and has both start and end date.
Reasoning is something that can be used to deal with this sort of issues, and some triplestores have it.
The query you need is this nonetheless:
SELECT ?spouseLabel ?sStart ?sEnd
WHERE {
BIND(wd:Q32522 as ?person).
?person p:P26 ?marriage .
?marriage pq:P580 ?sStart ;
ps:P26 ?spouse .
OPTIONAL{?marriage pq:P582 ?sEnd}
SERVICE wikibase:label { bd:serviceParam wikibase:language 'en' }
}
This gives the required result. Notice that the namespace for the properties of the wedding changes depending on what the object is.
See here for more.
I'm trying to create the simplest possible query to check if a name exists in Wikidata. For example, I just to want to see if the common name "Jack Smith" is in Wikidata.
Following the example query in this StackOverflow answer, I created the following SPARQL query (run it):
SELECT distinct ?item ?itemLabel ?itemDescription WHERE{
?item ?label "Jack Smith" .
?article schema:about ?item .
?article schema:inLanguage "en" .
?article schema:isPartOf <https://en.wikipedia.org/>.
SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
} LIMIT 10
However, it returns zero results.
On the other hand, if I search for "Jack Smith" through the Wikidata search webpage, I get back 1200+ results with a lot of people named "Jack Smith".
The behavior with the SPARQL interface is inconsistent. When I run a SPARQL search for "Abraham Lincoln" (run it), I correctly get back an entry for the American president by that name.
My specific questions are:
Why is my SPARQL query returning zero results for "Jack Smith"?
What is the simplest API call to check if a name (e.g. Jack Smith) exists in Wikidata? It could be SPARQL or some other REST API.
Thank you.
The query returns zero results because there is no Jack Smith about whom there is an article in English and is part of Wikipedia.org.
Every line in the body of a SPARQL query is a way to restrict the search as opposed to just a way to add new variables.
Look at this query:
SELECT ?person ?dateOfDeath
WHERE {
?person a :Person .
?person :date_of_death ?dateOfDeath .
}
This would only return people who have a date of death, i.e. who are dead, as well as the date.
If you wanted to return people, and optionally their date of death, i.e. if they are still alive, you don't want a date, but you do want the person, then use this:
SELECT ?person ?dateOfDeath
WHERE {
?person a :Person .
OPTIONAL {?person :date_of_death ?dateOfDeath }
}
In terms of your second question, I'd try something like this:
SELECT ?boolean
WHERE{
BIND(EXISTS{?item ?label "Jack Smith"} AS ?boolean)
}
This can of course also be issued as, say, a cURL request:
curl https://query.wikidata.org/bigdata/namespace/wdq/sparql -X POST --data 'query=SELECT%20%3Fboolean%0AWHERE%7B%0ABIND%28EXISTS%7B%3Fitem%20%3Flabel%20%22Jack%20Smith%22%7D%20AS%20%3Fboolean%29%0A%20%20%7D'
I want to retrieve informations from soccer player wikipedia inforboxes with the following properties (name, team, team number, apperances, goals) using the URIs returned by this wikidata query:
SELECT ?SoccerPlayer ?SoccerPlayerLabel ?Team ?TeamLabel ?TeamNumber ?numMatches ?numGoals ?startTime ?article WHERE
{?SoccerPlayer wdt:P106 wd:Q937857;
p:P54 ?stmt .
?stmt ps:P54 ?Team;
pq:P1350 ?numMatches;
pq:P1351 ?numGoals;
pq:P580 ?startTime .
optional {?stmt pq:P1618 ?TeamNumber} filter not exists {?SoccerPlayer p:P54/pq:P580 ?startTimeOther filter(?startTimeOther > ?startTime)}
FILTER(?startTime >= "2018-01-01T00:00:00Z"^^xsd:dateTime).
OPTIONAL { ?article schema:about ?SoccerPlayer .
?article schema:isPartOf <https://en.wikipedia.org/> . }
SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en".} } limit 200
Wikipedia infoboxes are plain text which can not be queried.
Instead, use either DBpedia or Wikidata.
DBpedia is likely more complete than Wikidata if it comes to data stored on English Wikipedia infoboxes but can not provide you much information beyond that.
In contrast, Wikidata aggregated data from various sources and can provide information about entities which do not have an Wikipedia article.
Absolute Wikidata and SPARQL beginner here. I am trying to find out the Q code of a particular female name, say Jennifer. I can get it with a query like this:
SELECT ?name WHERE {
?name wdt:P31 wd:Q11879590.
?name rdfs:label ?label.
FILTER((STR(?label)) = "Jennifer")
SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
}
LIMIT 1
That is, I look up entities that are instance of "female given name" and then filter to those with "Jennifer" in the label. It works, but it takes 5 s or more.
If I omit the LIMIT 1 I get many instances of the same results, which signals to me that I am doing something stupid.
Bottom line, is there an efficient way to look up the Q code for a "female given name"?