Question: Duerme Negrito is a popular Latin American folkloric lullaby, originally an area near the Venezuelan and Colombian border, the song was popularized by himself and other musicians, such as Mercedes Sosa, sometimes known as La Negra, was an Argentine singer, who was popular throughout Latin America and many countries outside the region, and was born, on which holiday?
Sentence (from "Mercedes Sosa"): With her roots in Argentine folk music, Sosa became one of the preeminent exponents of nueva canción.
Relevant evidence: No