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![Marina Castellano, who has done a bachelor's thesis with a mathematical system that is capable of warning of incidents on Rodalies on average 45 minutes before Renfe or Adif do it, photographed at the Badalona train station.](data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 9"%3E%3C/svg%3E)