[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a pentacyanonickelate(3-)."}, {"from": "gpt", "value": "[C-1][#N].[C-1][#N].[C-1][#N].[C-1][#N].[C-1][#N].[Ni+2]"}]