query: #title: Check very short strings
  # Complex constraint from [[Property talk:P670]]
  # Can by a future mandatory complex constraint
  SELECT ?item ?value
  WHERE {
    {
      ?item p:P670 [ ps:P670 ?value] .
    } UNION {
      ?statement1 pq:P670 ?value.
    } UNION {
      ?ref pr:P670 ?value .
      ?statement2 prov:wasDerivedFrom ?ref.
    } .
    FILTER(REGEX(STR(?value), "^([\\d\\-a-zA-Z\\/ ,à\\.&)]+)$" ) = false).
    FILTER (STRLEN(?value) < 2)
  }