How can I check whether a city Network Node has already been linked to an Alien Artifact?
One of the rules in Alpha Centauri is that each Network Node in a colony can only be used once with an Alien Artifact, to receive the research breakthrough. Other than keeping track manually of each time I use an Artifact at each city, is there any way in the game itself to see whether a city's Network Node hasn't used an artifact yet, so that I don't waste moving an artifact to an already-used city?
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