DESCRIBE ?changeset ?removal ?addition ?subjectOfChange  
WHERE { 
		?changeset a cs:ChangeSet . 
		?changeset cs:createdDate ?date .  
		?changeset cs:subjectOfChange ?subjectOfChange .  
		
	OPTIONAL {?changeset cs:removal ?removal .} 
	OPTIONAL {?changeset cs:addition ?addition } . 
	}