Complex sentence: Thus, Tamil, one of the longest surviving classical languages in the world has been described as "the only language of contemporary India which is recognizably continuous with a classical past" and having "one of the richest literatures in the world".
Split into simpler sentences: Thus, Tamil, one of the longest surviving classical languages in the world. It has been described as "the only language of contemporary India which is recognizably continuous with a classical past" and having "one of the richest literatures in the world".