Whether or not Romansh, Friulan and Ladin should compose a separate "Rhaeto-Romance" subgroup within Gallo-Romance is an unresolved issue, known as the "Questione ladina". Some linguists posit that these languages are descended from a common language, which was fractured geographically through the spread of German and Italian. The Italian linguist Graziadio Ascoli first made the claim in 1873. The other position holds that any similarities between these three languages can be explained through their relative geographic isolation, which shielded them from certain linguistic changes. By contrast, the Gallo-Italic varieties of Northern Italy were more open to linguistic influences from the South. Linguists who take this position often point out that the similarities between the languages are comparatively few. This position was first introduced by the Italian dialectologist Carlo Battisti.