Assertion: nickel | /r/AtLocation | glass
Facets:
value: to give a green color
type: PURPOSE
value: as a colorant
type: MANNER
Source sentences:
text: When added to glass, nickel gives a green color.
text: Nickel is also used for a variety of purposes including the production of coins, nickel-cadmium and nickel-metal hydride batteries; as a catalyst for certain chemical reactions; and, as a colorant, nickel is added to glass to give it a green color.