Assertion: gun's barrel | /r/CapableOf | mount on top of the other
Facets:
Source sentences:
text: For most of the history of the shotgun, the break-action breech loading double was the most common type, typically divided into two subtypes: the traditional "side by side" shotgun features two barrels mounted one beside the other (as the name suggests), whereas the "over and under" shotgun has the two barrels mounted one on top of the other.