MB-one

de-N	Dieser Benutzer spricht Deutsch als Muttersprache.

en-3	This user has advanced knowledge of English.

fr-1	Cet utilisateur dispose de connaissances de base en français.

pt-1	Este utilizador tem um nível básico de português.

mul-1	This user has basic knowledge of multiple languages.

This is a confirmed main account and no sock puppet.
(→ Verify – info)

This user loves OpenRefine.

Activities

p:P31/ps:P31/wdt:P279* (checks subclasses)
BIND(SUBSTR(STR(?item), (STRLEN(STR(<http://www.wikidata.org/entity/>))) + 1) AS ?qid) (extracts QID from URL)
BIND(SUBSTR( ?string, 1, 4 ) as ?substring) (extracts substrings; here: 1 = starting at first character; 4 = four characters long)
(COUNT(?item) AS ?count) (counts items)
(CONCAT('"', ?item, '"') AS ?value) (concatenates values and strings)
?article schema:about ?item .

?article schema:isPartOf <https://en.wikipedia.org/>. (checks for existing articles in other wikis)

filter(lang(?label_en) = 'en' && lang(?label_de) = 'de' && lang(?label_fr) = 'fr') (gives multiple language labels)

OPTIONAL {?item schema:description ?desc FILTER (LANG (?desc) = "de") .} (gives description in selected language)
BIND( IF( ?value1 = ?value2, "same", "different" ) AS ?result ) (compares values)
{ ?item wdt:P131 ?admin1. }

UNION

{ ?item wdt:P131 ?admin2. } (Union of two separate statements)

?statement ps:P131 wd:Q472 .

FILTER NOT EXISTS {

?statement prov:wasDerivedFrom ?ref

}(statement without references)

?statement ps:P1082 ?population.

?statement pq:P585 ?qualifier. (statement with qualifier)

?statement ps:P31 wd:Q278976. (check for non-truthy statements)