Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Sponsijzer-nl#Sense
Spugna di ferro-it#Sense
Iron sponge-en#Sense
Σπογγοσίδηρος-el#Sense
Eisenschwamm-de#Sense
Éponge de fer-fr#Sense