_:b57158732	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/2f4fbf51a3454341818365f12c910bb798349909/10> .
_:b57158733	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57158732	<http://www.w3.org/ns/oa#hasSelector>	_:b57158733 .
_:b57158733	<http://www.w3.org/ns/oa#exact>	"melatonin" .