_:b56539821	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56539821	<http://www.w3.org/ns/oa#exact>	"exercise" .
_:b56539820	<http://www.w3.org/ns/oa#hasSelector>	_:b56539821 .
_:b56539820	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/cd6de82b70bb7c544716d3b4ad69d63e5e33fdce/4> .