_:b57337416	<http://www.w3.org/ns/oa#hasSelector>	_:b57337417 .
_:b57337417	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57337417	<http://www.w3.org/ns/oa#exact>	"levels" .
_:b57337416	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/2fdecb78b744dd1d140bfe12ca52f2785266c213/52> .