Disambiguation evidence for British Rail Mark 3 coaching stock via surface form

"British Rail Mark 3 coach design"

Triples (2)

Triples where some other subject referred to this entity as "British Rail Mark 3 coach design".

British Rail Class 317 → derivedFrom →
"British Rail Mark 3 coach design"
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British Rail Class 321 → basedOn →
"British Rail Mark 3 coach design"
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