Suggested by the previous post …
" 'Dark Horse' is a song recorded by American singer
Katy Perry featuring rapper Juicy J. It was originally
released on September 17, 2013, by Capitol Records
as the first promotional single from Perry's fourth
studio album, Prism (2013)."
See also a link from the above date in this journal —
"In the Neighborhood of Mathematical Space,"
by Karen Shenfeld (1993).