Assertion: kidney stone's size | /r/HasProperty | usually at least 3 millimeters
Facets:
Source sentences:
text: If stones grow to sufficient size (usually at least 3 millimeters (0.12 in)) they can cause obstruction of the ureter.
text: If stones grow to sufficient size (usually at least 3 millimeters (0.1 in)) they can cause blockage of the ureter.