_:b56594837	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56594836	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/86ca9bd23e8ad555f6acd52fccda83eb621ffe68/0> .
_:b56594836	<http://www.w3.org/ns/oa#hasSelector>	_:b56594837 .
_:b56594837	<http://www.w3.org/ns/oa#exact>	"learning material" .