Assertion: nitrous oxide's number | /r/HasProperty | come to light
Facets:
Source sentences:
text: Nitrous oxide has become the focus of media attention after a number of cases linking it to deaths have come to light, and whilst (as with any substance) there are potential health risks associated with its excessive use, such as lack of oxygen to the brain, it is certainly not a new phenomenon or a more dangerous substance now than it has been in the past .