_:b56298633	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56298632	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/2d9acddd6c140449196f1afa895b5dd9e6029130/2> .
_:b56298632	<http://www.w3.org/ns/oa#hasSelector>	_:b56298633 .
_:b56298633	<http://www.w3.org/ns/oa#exact>	"placebo" .