Assertion: dragon | /r/HasAspect | its origin
Facets:
value: in a dragon
type: LOCATION
Source sentences:
text: This dragon has its origin in a dragon, or a serpent according to Mesonero Romanos, that was shown on the keystone in the arch of a gate of the disappeared walls of Madrid known as "Puerta Cerrada" or "Puerta de la Sierpe" (Closed Gate or Wyrm Gate in English).