query: #title: Duplicate between author and short author name at a given position in an authoring list
  # Complex constraint from [[Property talk:P2093]]
  # Identical P1545 for both a P50 and a P2093 statement
  select ?item ?interval where {
    ?item p:P2093/pq:P1545 ?interval ;
          p:P50/pq:P1545 ?interval .
    }
    LIMIT 1000