_:b56289960	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/28bfd55cd477029dab0e713bba17caa5da31ca55/2> .
_:b56289961	<http://www.w3.org/ns/oa#exact>	"placebo" .
_:b56289961	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56289960	<http://www.w3.org/ns/oa#hasSelector>	_:b56289961 .