Complex sentence: The Gandhāran Buddhist Texts are the oldest Buddhist manuscripts yet discovered, dating from about the first century CE and written in Gāndhārī, and also the oldest Indian manuscripts yet discovered.
Split into simpler sentences: The Gandhāran Buddhist Texts are the oldest Buddhist manuscripts yet discovered, dating from about the first century CE. They are written in Gāndhārī, and are also the oldest Indian manuscripts yet discovered.