Assertion: ascent blackout | /r/HasProperty | a loss of consciousness
Facets:
Source sentences:
text: An ascent blackout, or deep water blackout, is a loss of consciousness caused by cerebral hypoxia on ascending from a deep freedive or breath-hold dive, typically of ten metres or more when the swimmer does not necessarily experience an urgent need to breathe and has no other obvious medical condition that might have caused it.