Premise: "Some Velvet Morning" is a song written by Lee Hazlewood and originally recorded by Hazlewood and Nancy Sinatra in late 1967. It first appeared on Sinatra's album "Movin' with Nancy," the soundtrack to her 1967 television special of the same name, which also featured a performance of the song.
Hypothesis: One of Sinatra's albums that was released before 1970 had a song which she did not write herself.