Complex sentence: Dong Re Lao Mountain is located midway in the A Shau Valley, Vietnam, near the Laotian border, and is a densely forested 4,879-foot mountain just north of A Luoi, a former French airfield.
Split into simpler sentences: Dong Re Lao Mountain is located at in the A Shau Valley, Vietnam, near the Laotian border. It is densely forested and rises to, just north of A Luoi, a former French airfield.