thumb|upright|175px|A railroad brakeman's signal lantern, fueled by [[kerosene.]]
A lantern is a portable light source, historically fueled by kerosene, that was used by railroad workers like brakemen to signal and illuminate areas during their work. These devices were essential tools for railroad operations before modern electric lighting became standard.
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).