structural:expansion, information:filtering, linguistic:paraphrasing
Historicity

Leif is, in all likelihood, a historical figure who remains the first known European to set foot in continental North America, but other details of his life vary and are a subject of debate. It has been suggested by several scholars that both Leif's sister, Freydís, and his foster father, Tyrker, are works of fiction, as are their roles in the Vinland sagas. Leif's commission as a missionary to Greenland may also be fictional, as that aspect of his story is often attributed to Gunnlaugr Leifsson's version of Óláfs saga Tryggvasonar (which likely served as a source for some of the other sagas which mention Leif).