_:b57999505	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57999504	<http://www.w3.org/ns/oa#hasSelector>	_:b57999505 .
_:b57999505	<http://www.w3.org/ns/oa#exact>	"headache" .
_:b57999504	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/8f59418a584a3c076679bb7a5b5cc6695f6c135b/2> .