Premise: A lightning rod ( US , AUS ) or lightning conductor ( UK ) is a metal rod mounted on a structure and intended to protect the structure from a lightning strike . The main attribute common to all lightning rods is that they are all made of conductive materials , such as copper and aluminum . Copper and its alloys are the most common materials used in lightning protection .
Hypothesis: Lightning rods can be made from metals.
Label: ENTAILMENT