Assertion: ozone | /r/HasProperty | small part of the gases
Facets:
Source sentences:
text: Even though Ozone is only a small part of the gases in this layer, it plays a vital role because it shields us from the sun's harmful UV rays.
text: Even though Ozone is only a small part of the gases in this layer, it plays a vital role because it shields us from the sun’s harmful UV rays.