PREFIX ocds: <http://data.tbfy.eu/ontology/ocds#>
PREFIX dct: <http://purl.org/dc/terms/>

SELECT  ?qid ?qdescription ?qdate
WHERE {
	?id ocds:hasAmendment ?hamed .
	OPTIONAL { ?hamed ocds:amendmentId ?qid ;
						 				dct:description ?qdescription ;
						 				ocds:amendmentDate ?qdate } .
}