Ellie Sattler is actually Holdo who was esploded through hyperspace in a million drops of blood and one of these was slurped up by a mosquito on ancient Earth and trapped in amber, then grown in a test tube by Hammond as his first experiment after which she was adopted at an early age and by happenstance took an interest in paleobotany and had the opportunity to visit Isla Nublar. This is the opening crawl to TROS, the rest of which has been replaced by Jurassic Park. Thus it comes to be that Spielberg directs a Star Wars movie.