SELECT DISTINCT ?d
WHERE {
  	{
		GRAPH prj:Glycosmos6-GlycoEpitope {
			?o tao:denoted_by ?s .
		}

		?s tao:belongs_to ?d .
    }

    UNION

	{
		GRAPH prj:GlyCosmos6-Glycan-Motif-Structure {
			?o tao:denoted_by ?s .
		}

		?s tao:belongs_to ?d .
    }
}