Complex sentence: The genus "Sylvia", the typical warblers, forms part of a large family of Old World warblers, the Sylviidae, and fossils from France show that the genus dates back at least 20 million years.
Split into simpler sentences: The genus "Sylvia", the typical warblers, forms part of a large family of Old World warblers, the Sylviidae. Fossils from France show that the genus dates back at least 20 million years.