Complex sentence: After the anti-Communist revolutions of 1989, Mongolia saw its own peaceful democratic revolution in early 1990; it led to a multi-party system, a new constitution of 1992, and transition to a market economy.
Split into simpler sentences: After the anti-Communist revolutions of 1989, Mongolia conducted its own peaceful democratic revolution in early 1990. This led to a multi-party system, a new constitution of 1992, and transition to a market economy.