_:vb946780	<http://www.w3.org/2000/01/rdf-schema#label>	"ISM: Planetary nebulae" .
_:vb946780	<http://www.w3.org/2004/02/skos/core#member>	_:vb946781 .
_:vb946780	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/2004/02/skos/core#Collection> .
_:vb946778	<http://www.w3.org/2004/02/skos/core#member>	_:vb946780 .
_:vb946780	<http://www.w3.org/2004/02/skos/core#member>	<http://www.ivoa.net/rdf/Vocabularies/AAkeys#IsmPlanetaryNebulaeGeneral> .