SPARQL Query

Natural Language Query

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Example queries (22)

Basic

Count of triples
SELECT (COUNT(*) AS ?n) WHERE { ?s ?p ?o }
People Mahatma Gandhi influenced
SELECT ?o ?oLabel WHERE { gptkb:E803 gptkbp:P9 ?o }
What kind of thing is Mahatma Gandhi?
SELECT ?type ?typeLabel WHERE { gptkb:E803 gptkbp:P0 ?type }
Entities sharing the name "John Smith"
SELECT ?e ?eLabel WHERE { ?e rdfs:label "John Smith" } LIMIT 30
Things located in the United States
SELECT ?s ?sLabel WHERE { ?s gptkbp:P40 gptkb:E14 } LIMIT 30
Look up an entity by surface form "USA"
SELECT ?e ?eLabel WHERE { ?e (rdfs:label|skos:altLabel) "USA" }

Aggregation

Most frequent predicates
SELECT ?p ?pLabel (COUNT(*) AS ?freq) WHERE { ?s ?p ?o } GROUP BY ?p ?pLabel ORDER BY DES…
Most frequent classes
SELECT ?o (COUNT(*) AS ?freq) WHERE { ?s gptkbp:P0 ?o } GROUP BY ?o ORDER BY DESC(?freq)…
Distribution of triples per subject
select ?numtriples (count(*) as ?frequency) where { { select ?s (count(*) as ?count) wher…
Top 20 most-aliased entities (surface forms count)
SELECT ?e ?eLabel (COUNT(?form) AS ?nforms) WHERE { ?e (rdfs:label|skos:altLabel) ?form }…
Top predicates used for Mahatma Gandhi
SELECT ?p ?pLabel (COUNT(*) AS ?n) WHERE { gptkb:E803 ?p ?o } GROUP BY ?p ?pLabel ORDER B…
Entities classified under multiple concepts
SELECT ?s ?sLabel (COUNT(?c) AS ?nclasses) WHERE { ?s gptkbp:P0 ?c } GROUP BY ?s ?sLabel…
Most frequent genders
SELECT ?g (COUNT(?e) AS ?cnt) WHERE { ?e gptkbp:P72 ?g } GROUP BY ?g ORDER BY DESC(?cnt)…
Most frequent nationalities
SELECT ?l (COUNT(?e) AS ?cnt) WHERE { ?e gptkbp:P2 ?c . ?c rdfs:label ?l } GROUP BY ?c ?l…

Path

Property path: 1–3 hops Newton influenced
SELECT ?o ?oLabel WHERE { gptkb:E1610 gptkbp:P9{1,3} ?o }
Two-hop influence chain starting from Gandhi
SELECT ?o ?oLabel WHERE { gptkb:E803 gptkbp:P9/gptkbp:P9 ?o } LIMIT 30
Who influenced Newton (1–3 hops back)
SELECT ?s ?sLabel WHERE { ?s gptkbp:P9{1,3} gptkb:E1610 } LIMIT 30
San Francisco: type OR location (alternation)
SELECT ?o ?oLabel WHERE { gptkb:E242 gptkbp:P0|gptkbp:P40 ?o }

Surface forms

Surface form variations for the United States
SELECT ?form WHERE { gptkb:E14 (rdfs:label|skos:altLabel) ?form }
Homonyms: surface forms shared by many entities
SELECT ?form (COUNT(DISTINCT ?e) AS ?nents) WHERE { ?e (rdfs:label|skos:altLabel) ?form }…
Long surface forms (over 50 characters)
SELECT ?form WHERE { ?e (rdfs:label|skos:altLabel) ?form . FILTER(STRLEN(?form) > 50) }…
Entities answering to the surface form "America"
SELECT ?e ?eLabel WHERE { ?e (rdfs:label|skos:altLabel) "America" }