PREFIX pubann:<http://pubannotation.org/ontology/>
SELECT distinct ?d1
WHERE {
	GRAPH prj:MeasurableQuantitativeAnnotation {
		?o1 tao:denoted_by ?s1 .
	}
	GRAPH prj:LitCovid-PubTator-PubMed {
		?o2 tao:denoted_by ?s2 ; a <http://pubannotation.org/projects/LitCovid-PubTator-PubMed/Chemical> .
	}
	?s1 tao:belongs_to ?d1 .
	?s2 tao:belongs_to ?d1 .
}