Assertion: penny | /r/HasProperty | 88 percent copper
Facets:
value: from 1857
type: TEMPORAL
Source sentences:
text: From 1857, the cent was 88 percent copper and 12 percent nickel, giving the coin a whitish appearance.
text: From 1787 to 1837 the composition of the penny was pure copper; From 1837 to 1857, the penny was made of bronze (95 percent copper and 5 percent tin and zinc); From 1857, the penny was 88 percent copper and 12 percent nickel; The Cent became bronze again (95 percent copper and 5 percent tin and zinc) in 1864 and stayed that way until 1962; In 1962, the cent's zinc content was removed.