Original sentence: However, the Sephardic result is in contradiction  or not replicated in all the body of genetic studies done in Iberia and has been relativized by the authors themselves
Edited sentence: "They are really assuming that they are looking at this migration of Jewish immigrants, but the same lineages could have been introduced in the Neolithic" said Stephen Oppenheimer.However, the Sephardic result is in contradiction  or not replicated in all the body of genetic studies done in Iberia and conflicts with mainstream historiography (denies Neolithic, Roman, Greek, Phoenician, Germanic, Alani, Slavic, Arab and other contributions to modern Iberians) and has been relativized by the authors themselves <ref>.On the other hand, Chris Tyler-Smith, an expert on Y-chromosome genetics and a collaborator with the team that carried the study , argues that the individual differences in Y-chromosome markers suggest that Iberians and Sephardic Jews must share ancestry more recent than several millennia,