Q: In this task, you will use your knowledge about language (and common sense) to determine what element the marked number refers to. The numbers are marked with two underlines around them, like: _ number _. Your answer should be chosen from the given text, and should not contain other words.
Angel: Gone . What does it mean that she 's gone ?
Spike: Well , in the world of men , a person dies , they stay that way .
Angel: Unless you 're a vampire .
Spike: Or the ghost of _ one _ that saved the world .
Angel: Or Buffy .
A:
vampire