First world war soldiers' names are engraved on the walls of a former chalk quarry at the Cite Souterraine in Naours, France. Photo: AP

First world war soldiers leave their mark with graffiti found in Naours, France

Nearly 2,000 century-old inscriptions from the first world war uncovered in the underground city of complex tunnels in Naours, France

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First world war soldiers' names are engraved on the walls of a former chalk quarry at the Cite Souterraine in Naours, France. Photo: AP
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