_:b57833345	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/oa#TextQuoteSelector> .
_:b57833344	<http://www.w3.org/ns/oa#hasSelector>	_:b57833345 .
_:b57833345	<http://www.w3.org/ns/oa#exact>	"pH" .
_:b57833344	<http://www.w3.org/ns/oa#hasSource>	<http://ns.inria.fr/covid19/arg/efe9c08c881908c9a617c23c8b0ae9e8c7307dbd/0> .