Erotic romance novels are stories written about the development of a romantic relationship through sexual interaction. The sex is an inherent part of the story, character growth, and relationship development, and could not be removed without damaging the storyline.
The romance is an inherent part of the story in erotic romance novels.
I believe that the system had trouble deciphering the truth in what I wrote because i switched the word romance with sex. 
( z1 have-part :ARG1 ( z2 story ) :ARG2 ( z3 romance ) :mod ( z4 inherent ) :location ( z5 novel :mod ( z6 erotic ) :mod ( z7 romance ) ) )