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Connections
lighthouse
Entity
acetylene
Entity
Argentina
Country
Michigan
Entity
New South Wales
Entity
International Standard Book Number
Entity
Nobel Prize in Physics
Entity
Gustaf Dalén
Entity
Hebrides
Entity
Fresnel lens
Entity
Djurgården
Entity
Carl von Linde
Entity
lightvessel
Entity
Upper Peninsula of Michigan
Entity
Linde Group
Company
carbide lamp
Entity
foghorn
Entity
Argand lamp
Entity
sea mark
Entity
lighthouse keeper
Entity