Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Steinkohle-de#Sense
Coal-en#Sense
Stenkul-da#Sense
Hulla-es#Sense
Steenkool-nl#Sense
Hulha-pt#Sense
Γαιάνθρακας-el#Sense
Houille-fr#Sense
Litantrace-it#Sense