Complex sentence: The 1966 military coup limited freedom of expression at the institute and elsewhere; facing conditions such as this, numerous avant-garde artists (and others, particularly in academia) left Argentina, many never to return.
Split into simpler sentences: The 1966 military coup limited freedom of expression at the institute and elsewhere. Facing conditions such as this, numerous avant-garde artists (and others, particularly in academia) left Argentina, many never to return.