[Tango-artists] license?

[Gene Norris]

I am confused by the license.

Who exactly is the copyright holder for the Tango Icon Library?

If I use some tango icons in my program, am I required to do more than
state (in my about box): "Some icons are from the Tango Desktop Project."

If more is required, could they be explained in terms that are easily
understood and pertain to this project.

Thanks,

Gene Norris