_:b57432644	<http://www.w3.org/ns/oa#hasSelector>	_:b57432645 .
_:b57432645	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57432645	<http://www.w3.org/ns/oa#exact>	"efficiency" .
_:b57432644	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/e154d8e6506614857dd0ac68bb8e9abe930a3c9f/4> .