_:b56276556	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/35349bb1fc9290338907b7d7f104c9db3951163b/1> .
_:b56276556	<http://www.w3.org/ns/oa#hasSelector>	_:b56276557 .
_:b56276557	<http://www.w3.org/ns/oa#exact>	"placebo" .
_:b56276557	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .