Assertion: ufo | /r/HasProperty | interplanetary spacecraft
Facets:
Source sentences:
text: The UFO's are interplanetary spacecraft.
text: None of the astronomers, even during a friendly discussion, admitted that he thought the UFO's could be interplanetary vehicles.
text: It concluded that the UFO's were interplanetary spaceships.
text: The written verdict, the group was told, would be given to the National Security Council, a council made up of the directors of all U.S. intelligence agencies, and thence it would go to the President of the United States - if they should decide that the UFO's were interplanetary spacecraft.