Complex sentence: The poem continued to be attributed to Sappho into the nineteenth century, bus since then influential classicists--notably Ulrich von Wilamowitz-Moellendorf and Denys Page--have questioned this attribution.
Split into simpler sentences: The poem continued to be attributed to Sappho into the nineteenth century. More recently, influential classicists--notably Ulrich von Wilamowitz-Moellendorf and Denys Page--have questioned this attribution.