get all DISTINCT labels of an item

Question

I'm trying to get all distinct labels of a Wikidata Item.

I know I can get all labels of an item with the following query:

SELECT DISTINCT ?team ?labels WHERE {
  ?team wdt:P31 wd:Q13393265.
  ?team rdfs:label ?labels.
}
LIMIT 10

Link to query

But how would I go about only getting distinct labels (so no duplicates)?

I've tried the following:

SELECT DISTINCT ?team ?labels WHERE {
  ?team wdt:P31 wd:Q13393265.
  {
    SELECT DISTINCT * WHERE 
    {
      ?team rdfs:label ?labels.
    }
  }
}
LIMIT 10

Link to query

But the results still contain duplicate labels.

PS: limits are only set, so queries are fast while debugging. Once it works as intended, there will not be a limit

Answer 1

Your first query actually does show distinct labels, but the way Wikidata displays the results doesn’t make it clear.

These four literals are different, but Wikidata will display "foobar" every time:

"foobar"
"foobar"@en
"foobar"@en-US
"foobar"@es

To display the language, you can use lang():

SELECT DISTINCT ?team ?label (lang(?label) AS ?language) 
WHERE {
  ?team wdt:P31 wd:Q13393265.
  ?team rdfs:label ?label.
}
LIMIT 10

To ignore the language, you can use str(), which returns the lexical form:

SELECT DISTINCT ?team (str(?label) AS ?label_lexical)
WHERE {
  ?team wdt:P31 wd:Q13393265.
  ?team rdfs:label ?label.
}
LIMIT 10