Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Yield class-en#Sense
Classe de productivité-fr#Sense
Clase de producción-es#Sense
Leistungsklasse-de#Sense
Ertragsklasse-de#Sense
Classe di produttività-it#Sense