_:b56239780	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/ef20a0cd67ce018cf061f154bd8be9d0e58d0f23/0> .
_:b56239781	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56239780	<http://www.w3.org/ns/oa#hasSelector>	_:b56239781 .
_:b56239781	<http://www.w3.org/ns/oa#exact>	"placebo" .