Complex sentence: Until recently assumed by biologists to have been a relative of the Dodo ("Raphus cucullatus "), it was thus classified as a member of the didine pigeons (subfamily Raphinae) and called the"Réunion Solitaire " ("Raphus solitarius").
Split into simpler sentences: Until recently assumed by biologists to have been a relative of the Dodo ("Raphus cucullatus "), classified. It was thus classified as a member of the didine pigeons (subfamily Raphinae) and called the"Réunion Solitaire " ("Raphus solitarius").