query: #title: Duplicate statements
  # Complex constraint from [[Property talk:P3373]]
  # Items that seem to have multiple statements about the same sibling. [[User:KrBot]] might remove them.
  SELECT ?item ?ps1 WHERE {
    ?item p:P3373 ?statement1 .
    ?statement1 ps:P3373 ?ps1 .
    ?item p:P3373 ?statement2 .
    ?statement2 ps:P3373 ?ps1 .    
    FILTER (?statement1 != ?statement2  )
    } LIMIT 1000