1 PREFIX person:     <tag:heathers.globalcode.info,2020:person:>

     2 PREFIX predicate:  <tag:heathers.globalcode.info,2020:predicate:>

     3 PREFIX thing:      <tag:heathers.globalcode.info,2020:thing:>

     4 

     5 SELECT

     6 	?group_name

     7 	(count(*) AS ?member_count)

     8 WHERE {

     9 	?person predicate:is-member-of ?group .

    10 	?group predicate:has-title ?group_name .

    11 }

    12 GROUP BY ?group_name

    13 ORDER BY DESC(?member_count)