Complex sentence: In the east, the area borders the territory of the indigenous people of the Asháninka, which stretches to the Sira mountains, which are about 40 km away and almost 2500 m high.
Split into simpler sentences: In the east, the area borders the territory of the indigenous people of the Asháninka. Their area stretches to the Sira mountains, which are about 40 km away and almost 2500 m high.