Way to find out what's providing a virtual package

[Chris Lawrence <cnlawren@olemiss.edu>]

Is there some (easy) way to figure out what package is providing a
particular virtual or obsolete package?  I can do it with dpkg-awk,
but is there a more "dpkg-friendly" way?

Example: dpkg-awk 'Provides:c-shell' -- Package Version


Chris
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