_:b57821213	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57821212	<http://www.w3.org/ns/oa#hasSelector>	_:b57821213 .
_:b57821213	<http://www.w3.org/ns/oa#exact>	"visual impairment" .
_:b57821212	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/b9df1b627c01c518956efca03473193b3ad78104/2> .