_:b57171389	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57171388	<http://www.w3.org/ns/oa#hasSelector>	_:b57171389 .
_:b57171388	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/c74fefa0d284f1418654db6b8099740d69d019f8/4> .
_:b57171389	<http://www.w3.org/ns/oa#exact>	"variation" .