_:b57679104	<http://www.w3.org/ns/oa#hasSelector>	_:b57679105 .
_:b57679105	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57679105	<http://www.w3.org/ns/oa#exact>	"improvement" .
_:b57679104	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/c922cbcb255264cda2ef6e36e4fb6d514abba54e/0> .