The conversation between human and AI assistant.
[|Human|] Determine the 4th special element given the following 4 elements.
[|AI|] Based on the given elements, which are all metals, the 4th special element could be another metal such as Copper, Zinc or Gold. However, without more specific criteria or context, it is not possible to determine the 4th special element with certainty.
[|Human|] 
Determine the 4th special element given the following 4 elements.