During the second half of the twentieth century, the term folk music took on a third meaning: it describes a particular kind of popular music which is culturally descended from or otherwise influenced by traditional folk music, such as with The Kingston Trio, Bob Dylan, Simon & Garfunkel, The Byrds, Neil Young, Peter, Paul and Mary, The Mamas & the Papas, The Brothers Four and other singers. This music, in relation to popular music, is marked by a greater musical simplicity, acknowledgment of tradition, frequent socially conscious lyrics, and is similar to country, bluegrass, and other genres in style.