I need some help in a query.
I have a list of names and I want to write a program in python that will send a query for each person on the list and it will look for his information in dbpedia and in wikidata and will return some of it.
Can someone help me with this one?
Thanks
The following working python code takes the (slightly modified) query from #coder and uses it in a small demo program.
It will search for people with "Andreotti" as part of their name, and return one or more URLs each pointing to the page for one person found.
from SPARQLWrapper import SPARQLWrapper, JSON
NAME_FRAGMENT = "Andreotti"
QUERY = f"""
SELECT DISTINCT ?uri
WHERE {{
?uri a foaf:Person.
?uri ?p ?person_full_name.
FILTER(?p IN(dbo:birthName,dbp:birthName ,dbp:fullname,dbp:name)).
?uri rdfs:label ?person_name .
?person_name bif:contains "{NAME_FRAGMENT}" .
FILTER(langMatches(lang(?person_full_name), "en")) .
}}
LIMIT 100
"""
# Specify the DBPedia endpoint
sparql = SPARQLWrapper("http://dbpedia.org/sparql")
sparql.setQuery(QUERY)
sparql.setReturnFormat(JSON)
# Run the query
result = sparql.query().convert()
# The return data contains "bindings" (a list of dictionaries)
for link in result["results"]["bindings"]:
# We want the "value" attribute of the "comment" field
print(link["uri"]["value"])
Please note that as far as I understand the names are always scraped from the English wikipedia pages and therefore you will only find the English rendition (I stand to be corrected if this is not true).
Related
I am new to SPARQL and trying to fetch a movie adapted from specific book from dbpedia. This is what I have so far:
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT *
WHERE
{
<http://dbpedia.org/page/2001:_A_Space_Odyssey> a ?type.
?type onto:basedOn ?book .
?book a onto:Book
}
I can't get any results. How can I do that?
When using any web resource, and in your case the property :basedOn, you need to make sure that you have declared the right prefix. If you are querying from the DBpedia SPARQL endpoint, then you can directly use dbo:basedOneven without declaring it, as it is among predefined. Alternatively, if you want to use your own, or if you are using another SPARQL client, make sure that whatever short name you choose for this property, you declare the prefix for http://dbpedia.org/ontology/.
Then, first, to get more result you may not restrict the type of the subject of this triple pattern, as there could be movies that actually not type as such. So, a query like this
select distinct *
{
?movie dbo:basedOn ?book .
?book a dbo:Book .
}
will give you lots of good results but not all. For example, the resource from your example will be missing. You can easily check test the available properties between these two resource with a query like this:
select ?p
{
{<http://dbpedia.org/resource/2001:_A_Space_Odyssey_(film)> ?p <http://dbpedia.org/resource/2001:_A_Space_Odyssey> }
UNION
{ <http://dbpedia.org/resource/2001:_A_Space_Odyssey> ?p <http://dbpedia.org/resource/2001:_A_Space_Odyssey_(film)>}
}
You'll get only one result:
http://www.w3.org/2000/01/rdf-schema#seeAlso
(note that the URI is with 'resource', not with 'page')
Then you may search for any path between the two resource, using the method described here, or find a combination of other patterns that would increase the number of results.
I am using lookup in dbpedia such as this http://lookup.dbpedia.org/api/search.asmx/KeywordSearch?QueryString=all%20by%20myself to extract all results containing the text "All by myself" but now I only want to extract those results in which the description contains the words "Eric Carmen" or better if it can do a fuzzy selection such as pick both "Eric Carmen" and "Eric Karmen" in the description. Can anyone build a SPARQL for this? I have attached the result of the above url in this image. I have attached an answer from another query from stackoverflow Work around to query DBpedia for two keywords to help you understand.
You can start with this query which returns all resources that contain your keyword in the abstract property:
SELECT Distinct *
Where
{
?resource dbo:abstract ?abstract.
Filter langMatches(lang(?abstract),"EN").
?abstract bif:contains "Eric_Carmen".
}
You can consider http://dbpedia.org/ontology/abstract as description of any resource in Dbpedia.
I need to find all DBpedia categories and articles that their abstract include a specific word.
I know how to write a SPARQL query that queries the label like the following:
SELECT ?uri ?txt WHERE {
?uri rdfs:label ?txt .
?txt bif:contains "Machine" .
}
but I have not figured out yet how to search the abstract.
I've tried with the following but it seems not to be correct.
SELECT ?uri ?txt WHERE {
?uri owl:abstract ?txt .
?txt bif:contains "Machine" .
}
How can I retrieve the abstract in order to query its text?
Since you already know how to search a string for text content, this question is really about how to get the abstract. If you retrieve any DBpedia resource in a web browser, e.g., http://dbpedia.org/resource/Mount_Monadnock (which will redirect to http://dbpedia.org/page/Mount_Monadnock), you can see the triples of which it's a subject or predicate. In this case, you'll see that the property is dbpedia-owl:abstract. Thus you can do things like
select * where {
?s dbpedia-owl:abstract ?abstract .
?abstract bif:contains "Monadnock" .
filter langMatches(lang(?abstract),"en")
}
limit 10
SPARQL results
Instead of visiting the page for the resource, which not endpoints will support, you could have simply retrieved all the triples for the subject, and looked at which ones relate it to its abstract. Since you know the abstract is a literal, you could even restrict it to triples where the object is a literal, and perhaps with a language that you want. E.g.,
select ?p ?o where {
dbpedia:Mount_Monadnock ?p ?o .
filter ( isLiteral(?o) && langMatches(lang(?o),'en') )
}
SPARQL results
This also clearly shows that the property you want is http://dbpedia.org/ontology/abstract. When you have a live query interface that you can use to pull down arbitrary data, it's very easy to find out what parts of the data you want. Just pull down more than you want at first, and then refine to get just what you want.
I'm trying to make a SPARQL query using Prolog and DBpedia. My objective is to tag in text all Persons, so for retrieving famous people I made this query that remove all results like Music groups(Band) and Organization, since I want to tag only real people and not abstract
select ?person where{
{
?person a dbpedia-owl:Person; rdfs:label "Name Surname" #it.
}
UNION
{
?person a dbpedia-owl:Person; foaf:name "Name"#it; foaf:surname "Surname"#it.
}
UNION
{
?person a dbpedia-owl:Person; foaf:name "Name Surname"#it.
}
FILTER NOT EXISTS {
{ ?subject <http://airpedia.org/ontology/type_with_conf#10> dbpedia-owl:Band .
?subject rdfs:label ?artistName .
FILTER ( str(?artistName) = "Name Surname" )
}
UNION
{
?subject <http://airpedia.org/ontology/type_with_conf#10> dbpedia-owl:Organisation .
?subject rdfs:label ?artistName .
FILTER ( str(?artistName) = "Name Surname" )
}
}
}
I use It. version of Dbpedia if you run this query use this version although the results will not be good for me.
So for example if I search "Metallica" as a person i don't want to get results cause is it a Band or(for me, but in this case is Metallica are an Organisation too) an Organisation
and it works good this are the results Metallica Query Results and those are for "Michael Jackson" Michael Jackson Query results
My problem is when i put someone that is not a Singer or a Music band for example if i try something like "Jim Carrey" i get " error transction timed out Jim Carrey.
I think I got this problem because those properties are Undefined for Jim Carrey, but i tried an to put an OPTIONAL marker in each subquery in the first filter, but i get too the same error
I put the code in a pastebin file so you can find all three query
I know that i should not use Static String in a query or there are a lot of better mode but i need that since i compose the query with prolog and than send to sparql online so i must do in this way.
TO #Joshua I tried to remove the FILTER(String) in the NOT EXIST (Filter) But I will not work anymore thanks however for helping me
Excuse me for too much editing but i resolved some part of the starting problem but didn't find a solution
First problem :Filtering results based on specific properties with specific values. (Works)
Second : The first works only for Things with that specific property (as show above) like(Metallica,Michael Jackson, The Beatles, ...) but not for thos without the properties in the filter.
(i can't use more than two link because I'm a newbe so i will put a link in the comments with a pastebin links with the 3 Query and the results of they)
Is it possible to get the list of films in function of their genre?
I tried this:
SELECT DISTINCT ?film_title ?film_abstract ?film_genre
WHERE {
?film_title rdf:type <http://dbpedia.org/ontology/Film> .
?film_title rdfs:comment ?film_abstract .
?film_genre <http://dbpedia.org/ontology/genre> ?film_genre .
FILTER(lang(?film_abstract) = "en" ).
}
LIMIT 20
But probably I've doing something wrong !
Thanks,
Danilo
Looks like a simple typo on your part. The third triple pattern should be the following:
?film_title <http://dbpedia.org/ontology/genre> ?film_genre
Also the FILTER you are using may make the query very slow, try using the following instead:
FILTER(LANGMATCHES(LANG(?film_abstract), "en"))
Though having played with your query there doesn't appear to be any data that actually matches your query in DBPedia. Essentially the genre property you are using appears only to be applied to music and not to films so you should remove the third triple pattern entirely if you actually want to get any results