query: #title: Start date of the series should be before the start date of the series used as value
  # Complex constraint from [[Property talk:P2512]]
  # Sample: NCIS starts before NCIS:LA. Check date or statement
  SELECT ?item ?itemLabel ?value ?valueLabel
  {
  	?item wdt:P2512 ?value ; wdt:P580 ?s1 .
      ?value wdt:P580 ?s2 . 
      FILTER( ?s1 > ?s2 ) 
  	SERVICE wikibase:label { bd:serviceParam wikibase:language "en"  }    
  }
  LIMIT 100