_:b57272376	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/232dc9f3baa927facbe91722ae717e0738a73981/1> .
_:b57272377	<http://www.w3.org/ns/oa#exact>	"nitrogen compounds" .
_:b57272376	<http://www.w3.org/ns/oa#hasSelector>	_:b57272377 .
_:b57272377	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .