Assertion: rail | /r/MadeOf | aluminum
Facets:
Source sentences:
text: The bottom rail, top rail and vertical support members are made of a metal material (such as steel or aluminum).
text: The bottom rail, top rail and vertical support members are made of a metal material (such as steel or aluminum).
text: The bottom rail 12, top rail 14, vertical support members 16 and vertical rails 18 are made of a metal material (such as steel or aluminum).