Premise: Ray Erskine Parker Jr. (born May 1, 1954) is an American guitarist, singer-songwriter,  record producer, and actor, best known for writing and performing the theme song to the movie "Ghostbusters", for his solo music, and for performing with his band, Raydio, and with Barry White.
Hypothesis: Ray Erskine Parker Jr. wrote the theme song to "Ghostbusters" in late 1953.