Question: Kris Kristofferson, whose songs had been featured on Joan Baez' 1973 compilation "Hits: Greatest and Others," has also been in what music supergroup was with artists Waylon Jennings, Willie Nelson, and Johnny Cash? 
Sentence (from "Highwayman (song)"): "Highwayman" is a song written by American singer-songwriter Jimmy Webb, about a soul with incarnations in four different places in time and history: as a highwayman, a sailor, a construction worker on the Hoover Dam, and finally as a captain of a starship.
Relevant evidence: No