Complex sentence: Alexander Bichkov (known as Russia's Rambo) was a man who lived alone in a Russian forest for nearly 20 years, possessing a great arsenal, occasionally stealing from and "terrorizing" locals, and burning down nearby houses.
Split into simpler sentences: Alexander Bichkov (known as Russia's Rambo) was a man who lived alone in a Russian forest for nearly 20 years. Bichkov was know for stealing from, and "terrorizing" locals, and burning down nearby houses.