heritage operations began

URI: https://gptkb.org/prop/heritage_operations_began
4 triples
GPTKB property
Random triples
Subject Object
gptkb:Kent_and_East_Sussex_Railway_(heritage) 1974
gptkb:East_Lancashire_Railway 1987
gptkb:Derwent_Valley_Light_Railway 1993
gptkb:Heber_Valley_Railroad 1992