_:b56161617	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56161616	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/cbf67540b068488c423bd787d23143b5246a432d/1> .
_:b56161616	<http://www.w3.org/ns/oa#hasSelector>	_:b56161617 .
_:b56161617	<http://www.w3.org/ns/oa#exact>	"placebo" .