Assertion: volcano's flow | /r/CapableOf | ventilate the attic
Facets:
Source sentences:
text: Here's why: in the winter, allowing a natural flow of outdoor air to ventilate the attic helps keep it cold, which reduces the potential for ice damming (snow that melts off a roof from an attic that is too warm and then re-freezes at the gutters, causing an ice dam that can damage the roof).