Assertion: pony | /r/HasProperty | summoned by princess celestia
Facets:
value: in the return of harmony part
type: TEMPORAL
Source sentences:
text: When the ponies are summoned by Princess Celestia in The Return of Harmony Part 1, she tells them that she and her sister once used the Elements of Harmony to turn Discord into stone, shown in more detail in a flashback in Princess Twilight Sparkle - Part 2, and since the princesses are "no longer connected to the Elements," Discord has managed to escape.