_:b56264609	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56264608	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/88110f844fc7decc2c4e0d96d41777c95fcdb0ff/1> .
_:b56264609	<http://www.w3.org/ns/oa#exact>	"placebo" .
_:b56264608	<http://www.w3.org/ns/oa#hasSelector>	_:b56264609 .