Complex sentence: Heckman wrote several songs, but his best-known song was "When I See Beth Smiling," written for radio jock Howard Sternabout Stern's fiancée, model Beth Ostrosky.
Split into simpler sentences: Heckman wrote several songs, but his best-known song is "When I See Beth Smiling," which he wrote for radio jock Howard Stern. The song was written about Stern's fiancée, model Beth Ostrosky.