Original sentence: The Nostratic language family is a proposed macrofamily grouping together a number of language families including Indo-European, Uralic, Altaic, and more controversially Afro-Asiatic
Edited sentence: The Nostratic language family is a very controversial proposed macrofamily grouping together a number of language families including Indo-European, Uralic, Altaic, and — even more controversially — Afro-Asiatic