Complex sentence: The final girl is a trope in thriller and horror films (particularly slasher films) that specifically refers to the last woman or girl alive to confront the killer, ostensibly the one left to tell the story.
Split into simpler sentences: The final girl is a trope in thriller and horror films (particularly slasher films). It refers to the last woman alive to confront the killer, ostensibly the one left to tell the story.