_:b56216473	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b56216472	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/12439ee624230668be6ed4d78fc867d960d5f107/2> .
_:b56216473	<http://www.w3.org/ns/oa#exact>	"melatonin" .
_:b56216472	<http://www.w3.org/ns/oa#hasSelector>	_:b56216473 .