skosConcept prefLabel altLabel
http://data.europa.eu/949/concepts/etcs-baselines/eratv/2-0 
"2.0"
http://data.europa.eu/949/concepts/etcs-baselines/eratv/2-2-2 
"(2.2.2)"
http://data.europa.eu/949/concepts/etcs-baselines/eratv/3-0 
"3.0"