_:b57453952	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/c7f9bcfad9f619c5f2d61081c878e5a7c5676642/6> .
_:b57453953	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57453953	<http://www.w3.org/ns/oa#exact>	"heterogeneity" .
_:b57453952	<http://www.w3.org/ns/oa#hasSelector>	_:b57453953 .