question: In what year did the film release that introduced the titular extraterrestrial race that duels with Batman in the comic book crossover "Batman Versus Predator"?
answer: 1987
context: Title: Predator (franchise)
  Passage: The Predator film series is a science fiction action horror film franchise based on a race of fictional extraterrestrials created by Jim Thomas and John Thomas.  Produced by 20th Century Fox, the series started in 1987 with the film "Predator", which led to two sequels and novel, comic book and video game spin-offs.  Related to the franchise is the "Alien vs. Predator", which combine the titular Predator with the creatures from the "Alien" film series.
  Title: Batman Versus Predator
  Passage: Batman Versus Predator is a comic book crossover featuring a duel between Batman and a member of the titular extraterrestrial race from the "Predator" film franchise.  It was written by Dave Gibbons with art by Andy and Adam Kubert, and was published by DC Comics and Dark Horse Comics in 1991.  Adam Kubert won an Eisner Award in 1992 for his contribution.
  Title: Aliens versus Predator 2
  Passage: Aliens versus Predator 2 is a science fiction first-person shooter video game developed by Monolith Productions and published by Sierra Entertainment for Microsoft Windows in 2001, and for Mac OS X in 2003.  The game is a sequel to "Aliens versus Predator" (1999); both games are based on the characters of the "Alien" and "Predator" media franchises as well as the "Alien vs. Predator" crossover series.  It is set on the fictional planet LV-1201.
citations: Predator (franchise) Batman Versus Predator