Assertion: dawn | /r/HasProperty | mystical key
Facets:
value: to unlocking dimensions
type: PURPOSE
value: originally
type: OTHER
Source sentences:
text: As the series went on, the significance of Dawn's arrival is revealed to the series's other characters, and they come to understand that she has not always been Buffy's sister, or indeed a sentient being; Dawn had originally been the mystical "key" to unlocking dimensions and was made into Buffy's sister so the Slayer would protect her.