Assertion: ufo | /r/HasProperty | observed
Facets:
value: well enough to determine
type: MANNER
Source sentences:
text: UFOs aren’t some vague light or shape in the distance, but something which is observed well enough to determine that it doesn't correspond to any natural or manmade object or phenomenon known to investigators.
text: Hynek had supplied Project Sign with the Venus explanation in 1948, mainly because Venus had been in the same place in the sky that Mantell's UFO was observed.