_:b56788001	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56788000	<http://www.w3.org/ns/oa#hasSelector>	_:b56788001 .
_:b56788001	<http://www.w3.org/ns/oa#exact>	"B cell frequency" .
_:b56788000	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/a0f8e122c5aeb424f3f279bd46d3731799dbb7cf/3> .