Complex sentence: Abdi Agha catches up with the young couple, but only manages to capture Hatche, while Memed is able to avoid his pursuers and runs into the mountains whereupon he joins a band of brigands and exacts revenge against his old adversary.
Split into simpler sentences: Abdi Agha catches up with the young couple, but only manages to capture Hatche, while Memed is able to avoid his pursuers and runs into the mountains. There he joins a band of brigands and exacts revenge against his old adversary.