#
# Frequency table of the number of concepts per paper
#
SELECT ?label (COUNT(DISTINCT ?uri) AS ?count)
WHERE {
    SELECT ?uri (COUNT(DISTINCT ?concept) AS ?label)
    WHERE {
      ?uri a vivo:InformationResource .
      ?uri vivo:hasSubjectArea ?concept .
    }
    GROUP BY ?uri
}
GROUP BY ?label
ORDER BY ?label