: NO2Levelhttps://www.w3id.org/aservo# Create a prefix for https://www.w3id.org/aservo# Hit Enter to save Double click to create a prefix | rdfs:comment | Nitrogen dioxide level in the air | : SeismicActivityhttps://triplydb.com/jsemitiels/Vulganology/graphs/default/ Create a prefix for https://triplydb.com/jsemitiels/Vulganology/graphs/default/ Hit Enter to save Double click to create a prefix |