Assertion: comet's orbit | /r/HasProperty | periodic
Facets:
Source sentences:
text: The second comet found to have a periodic orbit was Encke's Comet (with the official designation of 2P/Encke).
text: The second comet to be discovered to have a periodic orbit was Comet Encke (official designation 2P/Encke).
text: The second comet to be discovered to have a periodic orbit