Question: When was the Punjabi singer featured in "Lak Mera Kach Warga" born? 
Sentence (from "Amar Singh Chamkila"): Amar Singh(21 July 1960 – 8 March 1988), commonly known by his stage name Amar Singh Chamkila, was a popular Punjabi singer, songwriter, musician, and composer.
Relevant evidence: Yes