Complex sentence: Khan sang two songs, "Prem Jogan Ban Ke Sunderi" and "Shubh Din Aayo", both of them qawwalis, which were included in the final film proved the virtuosity of Khan's singing.
Split into simpler sentences: Khan sang two songs, "Prem Jogan Ban Ke Sunderi" and "Shubh Din Aayo", both of them qawwalis. They were included in the final version of the film, proving the virtuosity of Khan's singing.