List of e1 where:

Entity1 = <http://dbpedia.org/resource/GNU_General_Public_License> . Drop
Entity1 = <http://dbpedia.org/resource/Beyond_This_Horizon> . Drop
Entity1 = <http://dbpedia.org/resource/Language_identification> . Drop
Entity1 = <http://dbpedia.org/resource/Postsingular> . Drop
Entity1 = <http://dbpedia.org/resource/A_Crown_of_Swords> . Drop