Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/2841004
Is Reference of Reference line-en#Sense
Ligne de quadrillage-fr#Sense
Grid line-en#Sense
Ligne de référence-fr#Sense
Vonatkoztatási vonal-hu#Sense
Atskaitos linija-lt#Sense