_:b56428760	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/831037c802a882a6cae47cd231349023241e6c74/0> .
_:b56428760	<http://www.w3.org/ns/oa#hasSelector>	_:b56428761 .
_:b56428761	<http://www.w3.org/ns/oa#exact>	"ulcer" .
_:b56428761	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .