The online relational database `Samian Research` contains a quarter of a million finds of potters’ stamps on Terra Sigillata from all over Europe. These Gaulish potters’ stamps have been found on 4300 sites throughout the Roman Empire, allowing for a) dating sites and b) Roman trade research. In order to provide this resource as FAIR data, we are transforming them into the LOD cloud. As a major challenge, we had to model vagueness and uncertainty in the original item descriptions relating to geographical locations and potform typologies as RDF statements. In this poster, we will present this transformation process, our modelling approach and its results.