Assertion: greenhouse's frame | /r/MadeOf | aluminum
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Most home greenhouse kits have frames made of either wood or aluminum.
text: The frames are made of wood, galvanized steel or aluminum.
text: Most greenhouses have a frame made of PVC, wood, or aluminum that is covered with film, plastic, or glass.
text: Their frames are often made of wood or aluminum, which brings up an important point: remember that the sun cannot shine through wood or aluminum, and therefore shade will be created.