Determining what port owns a file

[Mac Mason]

I want to put kghostview on a machine, but I don't want to install too
much of KDE in the progress.

Given that I have another machine with it already installed, how might I
go about figuring out which port owns, say, /usr/local/bin/kghostview?

(If anybody happens to know offhand, that would work too)

Thanks!

    --Mac
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