Original sentence: They commented that the Sarvastivada/Mulasarvastivada, Mahasanghika, and Sammitya were the principal early Buddhist schools still extant in India, along with the Theravada who by then had largely emmigrated to  Ceylon, although they were also still prominent in Kanchi
Edited sentence: They commented that the Sarvastivada/Mulasarvastivada, Mahasanghika, and Sammitya were the principal early Buddhist schools still extant in India, along with the Theravada who by then had largely emigrated to  Ceylon, although they were also still prominent in Kanchi