Sentence:  Laura, whose ambition is to become a professional writer, has been writing STAR TREK fiction since her early teens, and was recently nominated for a Hugo Award for <WSD>fan fiction</WSD> for her series ‘Federation and Empire'. 
Meaning of the word marked with <WSD> tags:  Amateur fiction created by fans, incorporating the characters and concepts of a commercial media property, typically without permission from the author or owner.