_:b56491936	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/fe1a7499648f283fd038af8422a103083b892216/1> .
_:b56491937	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56491936	<http://www.w3.org/ns/oa#hasSelector>	_:b56491937 .
_:b56491937	<http://www.w3.org/ns/oa#exact>	"concentration" .