SELECT DISTINCT ?s2
WHERE {
	GRAPH prj:Covid19_manual_annotation_v2 {
		?o1 tao:denoted_by ?s1 ; a <__URL__> .
	}

	GRAPH prj:LitCovid-sentences {
		?o2 tao:denoted_by ?s2 .
	}

	?s2 tao:contains ?s1 .

	# The triple patterns below are semantically redundant, but necessary for a performance reason.
	?s1 tao:belongs_to ?d .
	?s2 tao:belongs_to ?d .
}