Assertion: catheter's balloon | /r/HasProperty | filled with water
Facets:
value: to help keep it
type: PURPOSE
Source sentences:
text: The bladder end of the catheter has a balloon filled with water to help keep it in place.
text: This balloon is filled with water so that your catheter is safely held in your bladder.
text: It’s held inside your bladder by a balloon filled with water.