Original sentence: The Shakya clan of India, to which Gautama Buddha, called Śākyamuni "Sage of the Shakyas", belonged, were also likely Sakas as Michael Witzel and Christopher I.have demonstrated
Edited sentence: The Shakya clan of India, to which Gautama Buddha, called Śākyamuni "Sage of the Shakyas", belonged, has been suggested to be Sakas by Michael Witzel and Christopher I