_:b57409900	<http://www.w3.org/ns/oa#hasSelector>	_:b57409901 .
_:b57409900	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/ed7df72b3e3b59fbc931840d0691e0f364e62d8d/4> .
_:b57409901	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57409901	<http://www.w3.org/ns/oa#exact>	"proficiency" .