_:b57688696	<http://www.w3.org/ns/oa#hasSelector>	_:b57688697 .
_:b57688697	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57688697	<http://www.w3.org/ns/oa#exact>	"period" .
_:b57688696	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/5b3a5a9508eb52f7e0c740104d3c9a62702e5698/0> .