Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/66
Is Reference of Aardolie-nl#Sense
Olja-sv#Sense
Petróleo-es#Sense
Petróleo-pt#Sense
Petrolio-it#Sense
Pétrole-fr#Sense
Oil-en#Sense