Assertion: energy barrier | /r/CreatedBy | ancient race
Facets:
value: as a safeguard in order
type: PURPOSE
Source sentences:
text: According to the game Star Trek: Starfleet Academy, the library computer entry on the planet killer mentions a school of thought which believes that the galactic energy barrier may have been created by some ancient race as a safeguard in order to keep things such as the planet killers out of the galaxy.