_:b56171513	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56171513	<http://www.w3.org/ns/oa#exact>	"placebo" .
_:b56171512	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/6ac46cebdca71f2e25d8a884c5d3ce11fcaf16e7/0> .
_:b56171512	<http://www.w3.org/ns/oa#hasSelector>	_:b56171513 .