Assertion: endoscope | /r/HasProperty | rigid
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: Endoscopes can be rigid or flexible.
text: Earlier endoscopes were rigid metal tubes.
text: An endoscope, which may be rigid or flexible, can be used to examine organs, such as the throat or esophagus.
text: The endoscope consist of a fiber optic tube that is usually flexible, but may sometimes be rigid; a tiny camera at the end of the tube; a light source outside the body to transmit light through the tube, thus illuminating the organ or cavity; and a second channel, which the doctor can use in case a biopsy or any other intervention is necessary.