Complex sentence: She makes a living working on the apple farm of wealthy widower, Kailash Nath Kaushal, who also runs a mountaineering school, and has Amar Kumar as one of his students.
Split into simpler sentences: She makes a living working on the apple farm of wealthy widower, Kailash Nath Kaushal. Kaushal also runs a mountaineering school where Amar Kumar is one of his students.