Assertion: tower's structure | /r/HasProperty | generated by two ellipses
Facets:
Source sentences:
text: The form, volume and structure is generated by two ellipses, one at foundation level and the other at a horizontal plane at 450 metres.
text: The form, volume and structure of the towers is generated by two ellipses, one at foundation level and the other at a horizontal plane at 450 m (1,480 ft).