http://www.aktors.org/ontology/portal#has-email-address

used by 17:

• rkb-explorer-budapest
• rkb-explorer-darmstadt
• rkb-explorer-deepblue
• rkb-explorer-epsrc
• rkb-explorer-eurecom
• rkb-explorer-ft
• rkb-explorer-irit
• rkb-explorer-italy
• rkb-explorer-laas
• rkb-explorer-lisbon
• rkb-explorer-newcastle
• rkb-explorer-nsf
• rkb-explorer-risks
• rkb-explorer-roma
• rkb-explorer-southampton
• rkb-explorer-ulm
• rkb-explorer-wiki