Complex sentence: In 1961 it was granted autonomous rule and, seven years after the general unrest and left-wing riots of 1968, the Comoros broke all ties with France and established itself as an independent republic.
Split into simpler sentences: In 1961 it was granted autonomous rule and, seven years after the general unrest and left-wing riots of 1968. The Comoros broke all ties with France and established itself as an independent republic.