SELECT DISTINCT ?s2
WHERE {
	GRAPH prj:LitCovid-PubTator {
		?o1 a <https://id.nlm.nih.gov/mesh/C000606551> ; tao:denoted_by ?s1 . 
	}
	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 .
}