SELECT DISTINCT ?s3
WHERE {
	{#pragma group.joins
		{#pragma group.joins
			{#pragma group.joins
				GRAPH prj:LitCovid-PD-GlycoEpitope {
					?o1 tao:denoted_by ?s1 .
				}
						
				?s3 tao:contains ?s1 .
			}

			GRAPH prj:LitCovid-sentences {
				?o3 tao:denoted_by ?s3 .
			}
		}

		{#pragma group.joins
			GRAPH prj:LitCovid_Glycan-Motif-Structure {
				?o2 tao:denoted_by ?s2 .
			}
			?s3 tao:contains ?s2 .
		}
	}
}