_:b56304580	<http://www.w3.org/ns/oa#hasSelector>	_:b56304581 .
_:b56304581	<http://www.w3.org/ns/oa#exact>	"placebo" .
_:b56304580	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/6f8d9671da02c6c3069b96c466531e12ae716fcb/0> .
_:b56304581	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .