Original sentence: It should be noted that in the pre-1965 era, the term fan fiction was used in science fiction fandom to designate science fiction written by members of fandom and published in fanzines, as opposed from fiction that was professionally published.This usage is now obsolete
Edited sentence: (As a matter of historical interest, it should be noted that in the pre-1965 era, the term "fan fiction" was used in science fiction fandom to designate science fiction written by members of fandom and published in fanzines, as distinguished from fiction professionally published; this usage is now obsolete