Assertion: asteroid | /r/CapableOf | observe at four or more apparitions
Facets:
Source sentences:
text: 4 Asteroids observed at four or more apparitions, last more than ten years ago.
text: 2 Asteroids observed at only two apparitions.
text: 3 Asteroids observed at only three apparitions.
text: 5 Asteroids observed at four or more apparitions, only one night in last ten years.